feat(twenty-sdk): extract & compile app translations into the manifest (#22236)

## Summary

**PR 2/4** of the app-metadata-translations stack. Gives app developers
the authoring side, as part of the normal manifest build — and it stays
out of the way of developers who don't translate.

- `twenty-sdk` CLI i18n pipeline: collect translatable strings from the
manifest, generate value-as-key message ids (`sha256(value)` truncated,
byte-identical to the server's `generateMessageId`), a `dev
i18n-extract` command to scaffold per-locale catalog files, and a
compile step folded into `build` that emits `manifest.translations`.
- Opt-in: no `locales/` dir → `compileApplicationTranslations` returns
`undefined` → manifest is unchanged.
- Adds an optional `locale` to the front-component execution context so
components can translate against the host locale.

## Stack
Stacks on #22235 (PR 1/4). Base branch:
`claude/app-translation-1-runtime-resolution`.

## Tests
Unit (vitest): extract/compile round-trip + message-id determinism.

## Verification note
`yarn install` could not complete in the remote dev environment, so
typecheck/lint/tests were not run locally — **CI is the source of
truth**.

https://claude.ai/code/session_01NiE7o3cd3zCLZarVkJa6UA

---
_Generated by [Claude
Code](https://claude.ai/code/session_01NiE7o3cd3zCLZarVkJa6UA)_

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

@@ -80,7 +80,7 @@ export const useFrontComponentExecutionContext = ({
   } = useSnackBar();
   const { closeSidePanelMenu } = useSidePanelMenu();
   const { copyToClipboard: copyToClipboardWithSnackbar } = useCopyToClipboard();
-  const { t } = useLingui();
+  const { t, i18n } = useLingui();
   // oxlint-disable-next-line twenty/no-state-useref
   const lastCopyToClipboardCallAtRef = useRef<number>(Number.NEGATIVE_INFINITY);
   const setCommandMenuItemProgress = useSetAtomFamilyState(
@@ -252,6 +252,7 @@ export const useFrontComponentExecutionContext = ({
     recordId: selectedRecordIds?.length === 1 ? selectedRecordIds[0] : null,
     selectedRecordIds: selectedRecordIds ?? [],
     colorScheme,
+    locale: i18n.locale,
   };
 
   const unmountFrontComponent: FrontComponentHostCommunicationApi['unmountFrontComponent'] =