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/command-menu-item/engine-command/selectors/isEngineCommandMountedFamilySelector.ts

@@ -0,0 +1,16 @@
+import { mountedEngineCommandsState } from '@/command-menu-item/engine-command/states/mountedEngineCommandsState';
+import { createAtomFamilySelector } from '@/ui/utilities/state/jotai/utils/createAtomFamilySelector';
+
+export const isEngineCommandMountedFamilySelector = createAtomFamilySelector<
+  boolean,
+  string
+>({
+  key: 'isEngineCommandMountedFamilySelector',
+  get:
+    (engineCommandId: string) =>
+    ({ get }) => {
+      const mountedMap = get(mountedEngineCommandsState);
+
+      return mountedMap.has(engineCommandId);
+    },
+});