Some idle CPU and disk/io fixes, new CommandChanged plugin Event (#5063)

* initial implementation

* fix mouse cpu spam

* prevent excess metadata write and prune sessions on startup

* consolidate CommandChanged and PaneCommandChanged

* tests

* rustfmt

* add pr

1 files changed, 16 insertions, 0 deletions

diff --git a/zellij-utils/src/plugin_api/plugin_command.proto b/zellij-utils/src/plugin_api/plugin_command.proto
index 63baa443..0b768838 100644
--- a/zellij-utils/src/plugin_api/plugin_command.proto
+++ b/zellij-utils/src/plugin_api/plugin_command.proto
@@ -203,6 +203,7 @@ enum CommandName {
   ClearPaneHighlights = 208;
   OpenPluginPaneFloating = 209;
   ListWindowsVolumes = 210;
+  GetSessionList = 211;
 }
 
 message PluginCommand {
@@ -354,6 +355,7 @@ message PluginCommand {
     SetPaneRegexHighlightsPayload set_pane_regex_highlights_payload = 158;
     ClearPaneHighlightsPayload clear_pane_highlights_payload = 159;
     OpenPluginPaneFloatingPayload open_plugin_pane_floating_payload = 160;
+    GetSessionListPayload get_session_list_payload = 161;
   }
 }
 
@@ -1295,3 +1297,17 @@ message OpenPluginPaneFloatingPayload {
 message OpenPluginPaneFloatingResponse {
   optional PaneId pane_id = 1;
 }
+
+message GetSessionListPayload {}
+
+message SessionListSnapshot {
+  repeated event.SessionManifest live_sessions = 1;
+  repeated event.ResurrectableSession resurrectable_sessions = 2;
+}
+
+message GetSessionListResponse {
+  oneof result {
+    SessionListSnapshot snapshot = 1;
+    string error = 2;
+  }
+}