slosh --install-terminfo: the binary carries its own terminfo entry

The xterm-256color fallback works everywhere; the real entry is
better, and a tarball user on a bare box had no easy way to get it.
The entry is generated from the vendored tree (contrib/terminfo, so
it describes the terminal core we actually ship), compiled with tic,
embedded as bytes, and written to ~/.terminfo under every name it
answers to, letter and Darwin-hashed layouts both. No root, no
package, no conflict with a ghostty installed later. Proven end to
end in a mount namespace: bare box falls back, installs, and the
next pane says xterm-ghostty.

4 files changed, 316 insertions, 0 deletions

diff --git a/contrib/terminfo/README.md b/contrib/terminfo/README.md
new file mode 100644
index 0000000..30d579d
--- /dev/null
+++ b/contrib/terminfo/README.md
@@ -0,0 +1,34 @@
+# The xterm-ghostty terminfo, for machines that have never met ghostty
+
+Panes advertise `TERM=xterm-ghostty` when the entry resolves, and fall back
+to `xterm-256color` when it does not (see `pty_term()` in `src/pty.c`). The
+fallback works everywhere; the real entry is better. `slosh
+--install-terminfo` writes it into `~/.terminfo`, which is the first place
+curses looks, needs no root, and conflicts with no package manager.
+
+The files here:
+
+| file | what |
+|---|---|
+| `gen.zig` | prints the vendored libghostty-vt's terminfo *source* |
+| `xterm-ghostty.ti` | that output, committed for review and provenance |
+| `xterm-ghostty.terminfo` | the same, compiled with `tic -x`; what the binary embeds |
+
+The Makefile turns the compiled entry into `build/terminfo.h`, so the binary
+carries its own copy: a static tarball on a bare box can fix that box.
+
+## Regenerating, on a re-vendor
+
+The entry is generated **from the vendored tree**, so it describes the
+terminal core we actually ship, not whatever ghostty is installed here:
+
+```sh
+cd contrib/terminfo
+zig build-exe -femit-bin=/tmp/tigen --dep terminfo -Mroot=gen.zig \
+    -Mterminfo=../../vendor/libghostty-vt/src/terminfo/main.zig
+/tmp/tigen > xterm-ghostty.ti
+tic -x -o /tmp/ti xterm-ghostty.ti && cp /tmp/ti/x/xterm-ghostty xterm-ghostty.terminfo
+```
+
+Commit both outputs. `tic` warning about "older tic versions" is about the
+description field and harmless.
diff --git a/contrib/terminfo/gen.zig b/contrib/terminfo/gen.zig
new file mode 100644
index 0000000..8ed817a
--- /dev/null
+++ b/contrib/terminfo/gen.zig
@@ -0,0 +1,11 @@
+//! Print the vendored libghostty-vt's terminfo source to stdout.
+//! Run at re-vendor time (see README.md here); the output is committed.
+const std = @import("std");
+const terminfo = @import("terminfo");
+
+pub fn main(init: std.process.Init) !void {
+    var buf: [64 * 1024]u8 = undefined;
+    var w = std.Io.File.stdout().writerStreaming(init.io, &buf);
+    try terminfo.ghostty.encode(&w.interface);
+    try w.interface.flush();
+}
diff --git a/contrib/terminfo/xterm-ghostty.terminfo b/contrib/terminfo/xterm-ghostty.terminfo
new file mode 100644
index 0000000..f41a6d0
--- /dev/null
+++ b/contrib/terminfo/xterm-ghostty.terminfo
diff --git a/contrib/terminfo/xterm-ghostty.ti b/contrib/terminfo/xterm-ghostty.ti
new file mode 100644
index 0000000..92cbd69
--- /dev/null
+++ b/contrib/terminfo/xterm-ghostty.ti
@@ -0,0 +1,271 @@
+xterm-ghostty|ghostty|Ghostty,
+	am,
+	bce,
+	ccc,
+	hs,
+	km,
+	mc5i,
+	mir,
+	msgr,
+	npc,
+	xenl,
+	AX,
+	Tc,
+	Su,
+	XT,
+	fullkbd,
+	colors#256,
+	cols#80,
+	it#8,
+	lines#24,
+	pairs#32767,
+	acsc=++\,\,--..00``aaffgghhiijjkkllmmnnooppqqrrssttuuvvwwxxyyzz{{||}}~~,
+	Smulx=\E[4:%p1%dm,
+	Smol=\E[53m,
+	Rmol=\E[55m,
+	Setulc=\E[58:2::%p1%{65536}%/%d:%p1%{256}%/%{255}%&%d:%p1%{255}%&%d%;m,
+	Ss=\E[%p1%d q,
+	Se=\E[0 q,
+	Ms=\E]52;%p1%s;%p2%s\007,
+	Sync=\E[?2026%?%p1%{1}%-%tl%eh%;,
+	BD=\E[?2004l,
+	BE=\E[?2004h,
+	PS=\E[200~,
+	PE=\E[201~,
+	XM=\E[?1006;1000%?%p1%{1}%=%th%el%;,
+	xm=\E[<%i%p3%d;%p1%d;%p2%d;%?%p4%tM%em%;,
+	RV=\E[>c,
+	rv=\E\\[[0-9]+;[0-9]+;[0-9]+c,
+	XR=\E[>0q,
+	xr=\EP>\\|[ -~]+a\E\\,
+	Enmg=\E[?69h,
+	Dsmg=\E[?69l,
+	Clmg=\E[s,
+	Cmg=\E[%i%p1%d;%p2%ds,
+	clear=\E[H\E[2J,
+	E3=\E[3J,
+	fe=\E[?1004h,
+	fd=\E[?1004l,
+	kxIN=\E[I,
+	kxOUT=\E[O,
+	bel=^G,
+	blink=\E[5m,
+	bold=\E[1m,
+	cbt=\E[Z,
+	civis=\E[?25l,
+	cnorm=\E[?12l\E[?25h,
+	cr=\r,
+	csr=\E[%i%p1%d;%p2%dr,
+	cub=\E[%p1%dD,
+	cub1=^H,
+	cud=\E[%p1%dB,
+	cud1=^J,
+	cuf=\E[%p1%dC,
+	cuf1=\E[C,
+	cup=\E[%i%p1%d;%p2%dH,
+	cuu=\E[%p1%dA,
+	cuu1=\E[A,
+	cvvis=\E[?12;25h,
+	dch=\E[%p1%dP,
+	dch1=\E[P,
+	dim=\E[2m,
+	dl=\E[%p1%dM,
+	dl1=\E[M,
+	dsl=\E]2;\007,
+	ech=\E[%p1%dX,
+	ed=\E[J,
+	el=\E[K,
+	el1=\E[1K,
+	flash=\E[?5h$<100/>\E[?5l,
+	fsl=^G,
+	home=\E[H,
+	hpa=\E[%i%p1%dG,
+	ht=^I,
+	hts=\EH,
+	ich=\E[%p1%d@,
+	ich1=\E[@,
+	il=\E[%p1%dL,
+	il1=\E[L,
+	ind=\n,
+	indn=\E[%p1%dS,
+	initc=\E]4;%p1%d;rgb\:%p2%{255}%*%{1000}%/%2.2X/%p3%{255}%*%{1000}%/%2.2X/%p4%{255}%*%{1000}%/%2.2X\E\\,
+	invis=\E[8m,
+	oc=\E]104\007,
+	op=\E[39;49m,
+	rc=\E8,
+	rep=%p1%c\E[%p2%{1}%-%db,
+	rev=\E[7m,
+	ri=\EM,
+	rin=\E[%p1%dT,
+	ritm=\E[23m,
+	rmacs=\E(B,
+	rmam=\E[?7l,
+	rmcup=\E[?1049l,
+	rmir=\E[4l,
+	rmkx=\E[?1l\E>,
+	rmso=\E[27m,
+	rmul=\E[24m,
+	rmxx=\E[29m,
+	setab=\E[%?%p1%{8}%<%t4%p1%d%e%p1%{16}%<%t10%p1%{8}%-%d%e48;5;%p1%d%;m,
+	setaf=\E[%?%p1%{8}%<%t3%p1%d%e%p1%{16}%<%t9%p1%{8}%-%d%e38;5;%p1%d%;m,
+	setrgbb=\E[48:2:%p1%d:%p2%d:%p3%dm,
+	setrgbf=\E[38:2:%p1%d:%p2%d:%p3%dm,
+	sgr=%?%p9%t\E(0%e\E(B%;\E[0%?%p6%t;1%;%?%p5%t;2%;%?%p2%t;4%;%?%p1%p3%|%t;7%;%?%p4%t;5%;%?%p7%t;8%;m,
+	sgr0=\E(B\E[m,
+	sitm=\E[3m,
+	smacs=\E(0,
+	smam=\E[?7h,
+	smcup=\E[?1049h,
+	smir=\E[4h,
+	smkx=\E[?1h\E=,
+	smso=\E[7m,
+	smul=\E[4m,
+	smxx=\E[9m,
+	tbc=\E[3g,
+	tsl=\E]2;,
+	u6=\E[%i%d;%dR,
+	u7=\E[6n,
+	u8=\E[?%[;0123456789]c,
+	u9=\E[c,
+	vpa=\E[%i%p1%dd,
+	kDC=\E[3;2~,
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+	kDC4=\E[3;4~,
+	kDC5=\E[3;5~,
+	kDC6=\E[3;6~,
+	kDC7=\E[3;7~,
+	kDN=\E[1;2B,
+	kDN3=\E[1;3B,
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+	kIC5=\E[2;5~,
+	kIC6=\E[2;6~,
+	kIC7=\E[2;7~,
+	kLFT=\E[1;2D,
+	kLFT3=\E[1;3D,
+	kLFT4=\E[1;4D,
+	kLFT5=\E[1;5D,
+	kLFT6=\E[1;6D,
+	kLFT7=\E[1;7D,
+	kNXT=\E[6;2~,
+	kNXT3=\E[6;3~,
+	kNXT4=\E[6;4~,
+	kNXT5=\E[6;5~,
+	kNXT6=\E[6;6~,
+	kNXT7=\E[6;7~,
+	kPRV=\E[5;2~,
+	kPRV3=\E[5;3~,
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+	kPRV7=\E[5;7~,
+	kRIT=\E[1;2C,
+	kRIT3=\E[1;3C,
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+	kUP=\E[1;2A,
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+	kcbt=\E[Z,
+	kcub1=\EOD,
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+	kcuf1=\EOC,
+	kcuu1=\EOA,
+	kdch1=\E[3~,
+	kend=\EOF,
+	kent=\EOM,
+	kf1=\EOP,
+	kf10=\E[21~,
+	kf11=\E[23~,
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+	kf13=\E[1;2P,
+	kf14=\E[1;2Q,
+	kf15=\E[1;2R,
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+	khome=\EOH,
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+	kpp=\E[5~,
+	kri=\E[1;2A,
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+	sc=\E7,