Add progress tracking to command menu items (#18732)

Introduces a progress indicator for command menu items (both engine
commands and front components). When a command is running, the menu item
now displays a percentage alongside the loader spinner instead of just a
spinner.

- Added `commandMenuItemProgressFamilyState` to track per-item progress
and `CommandListItemLoader` to render it
- Exposed `updateProgress` in the twenty-sdk public API so front
components can report execution progress back to the host
- Wired progress reporting into `ExportMultipleRecordsCommand` as the
first consumer, showing CSV export progress
- Progress state is cleaned up on unmount for both engine commands and
headless front components
- Refactor

packages/twenty-front/src/modules/front-components/hooks/useUnmountHeadlessFrontComponent.ts

@@ -1,5 +1,6 @@
 import { useCallback } from 'react';
 
+import { commandMenuItemProgressFamilyState } from '@/command-menu-item/states/commandMenuItemProgressFamilyState';
 import { mountedHeadlessFrontComponentMapsState } from '@/front-components/states/mountedHeadlessFrontComponentMapsState';
 import { useStore } from 'jotai';
 
@@ -7,11 +8,23 @@ export const useUnmountHeadlessFrontComponent = () => {
   const store = useStore();
   const unmountHeadlessFrontComponent = useCallback(
     (frontComponentId: string) => {
+      const currentMap = store.get(mountedHeadlessFrontComponentMapsState.atom);
+      const mountContext = currentMap.get(frontComponentId);
+
       store.set(mountedHeadlessFrontComponentMapsState.atom, (previousMap) => {
         const next = new Map(previousMap);
         next.delete(frontComponentId);
         return next;
       });
+
+      if (mountContext) {
+        store.set(
+          commandMenuItemProgressFamilyState.atomFamily(
+            mountContext.commandMenuItemId,
+          ),
+          undefined,
+        );
+      }
     },
     [store],
   );