feat: added mouse-reporting / toggle-mouse-reporting (#9282)

Closes #8430

A few questions:
* Should I set a default keybind for `toggle-mouse-reporting`? The issue
mentioned one, it's currently unset.
* Am I handling the `toggle-mouse-reporting` action properly in
`performAction` (gtk) / `action` (macos)?

Copilot was used to understand the codebase, but code was authored
manually.

src/input/command.zig

@@ -449,6 +449,12 @@ fn actionCommands(action: Action.Key) []const Command {
             .description = "Toggle secure input mode.",
         }},
 
+        .toggle_mouse_reporting => comptime &.{.{
+            .action = .toggle_mouse_reporting,
+            .title = "Toggle Mouse Reporting",
+            .description = "Toggle whether mouse events are reported to terminal applications.",
+        }},
+
         .check_for_updates => comptime &.{.{
             .action = .check_for_updates,
             .title = "Check for Updates",