Introduce a new ToggleGraphicsProfiler command (#7607)

On macOS, this will enable or disable the Metal HUD at runtime. Note
that this only works when Zed is bundled because it requires to set the
`MetalHudEnabled` key in the Info.plist.

Release Notes:

- Added a new `ToggleGraphicsProfiler` command that can be used as an
action (or via the `Help -> Toggle Graphics Profiler` menu) to
investigate graphics performance.

crates/zed/resources/info/Permissions.plist

@@ -22,3 +22,5 @@
 <string>An application in Zed wants to use speech recognition.</string>
 <key>NSRemindersUsageDescription</key>
 <string>An application in Zed wants to use your reminders.</string>
+<key>MetalHudEnabled</key>
+<true />

crates/zed/src/app_menus.rs

@@ -155,6 +155,10 @@ pub fn app_menus() -> Vec<Menu<'static>> {
                 MenuItem::action("View Telemetry", crate::OpenTelemetryLog),
                 MenuItem::action("View Dependency Licenses", crate::OpenLicenses),
                 MenuItem::action("Show Welcome", workspace::Welcome),
+                MenuItem::action(
+                    "Toggle Graphics Profiler",
+                    workspace::ToggleGraphicsProfiler,
+                ),
                 MenuItem::separator(),
                 MenuItem::separator(),
                 MenuItem::action(