feat(sdk): support viewSorts in app manifests (#19881)

## Summary

Today the SDK lets apps declare `filters` on a view but not `sorts`, so
any view installed via an app manifest can never have a default
ordering. This PR adds declarative view sorts end-to-end: SDK manifest
type, `defineView` validation, CLI scaffold, and the application
install/sync pipeline that converts the manifest into the universal flat
entity used by workspace migrations. The persistence layer
(`ViewSortEntity`, resolvers, action handlers, builders…) already
existed server-side; the missing piece was the manifest → universal-flat
converter and the relation wiring on `view`.

## Changes

**`twenty-shared`**
- Add `ViewSortDirection` enum (`ASC` | `DESC`) and re-export it from
`twenty-shared/types`.
- Add `ViewSortManifest` type and an optional `sorts?:
ViewSortManifest[]` on `ViewManifest`, exported from
`twenty-shared/application`.

**`twenty-sdk`**
- Validate `sorts` entries in `defineView` (`universalIdentifier`,
`fieldMetadataUniversalIdentifier`, `direction` ∈ `ASC`/`DESC`).
- Add a commented `// sorts: [ ... ]` example to the CLI view scaffold
template + matching snapshot assertion.

**`twenty-server`**
- Re-export `ViewSortDirection` from `twenty-shared/types` in
`view-sort/enums/view-sort-direction.ts` (single source of truth,
backward compatible for existing imports).
- New converter `fromViewSortManifestToUniversalFlatViewSort` (+ unit
tests for `ASC` and `DESC`).
- Wire the converter into
`computeApplicationManifestAllUniversalFlatEntityMaps` so
`viewManifest.sorts` are added to `flatViewSortMaps`, mirroring how
filters are processed.
- Replace the `// @ts-expect-error TODO migrate viewSort to v2 /
viewSorts: null` placeholder in `ALL_ONE_TO_MANY_METADATA_RELATIONS`
with the proper relation (`viewSortIds` /
`viewSortUniversalIdentifiers`).
- Update affected snapshots (`get-metadata-related-metadata-names`,
`all-universal-flat-entity-foreign-key-aggregator-properties`).

## Example usage

\`\`\`ts
defineView({
  name: 'All issues',
  objectUniversalIdentifier: 'issue',
  sorts: [
    {
      universalIdentifier: 'all-issues__sort-created-at',
      fieldMetadataUniversalIdentifier: 'createdAt',
      direction: 'DESC',
    },
  ],
});
\`\`\`

packages/twenty-server/src/engine/metadata-modules/flat-entity/constant/all-one-to-many-metadata-relations.constant.ts

@@ -136,8 +136,11 @@ export const ALL_ONE_TO_MANY_METADATA_RELATIONS = {
       universalFlatEntityForeignKeyAggregator:
         'viewFieldGroupUniversalIdentifiers',
     },
-    // @ts-expect-error TODO migrate viewSort to v2
-    viewSorts: null,
+    viewSorts: {
+      metadataName: 'viewSort',
+      flatEntityForeignKeyAggregator: 'viewSortIds',
+      universalFlatEntityForeignKeyAggregator: 'viewSortUniversalIdentifiers',
+    },
   },
   viewField: {},
   viewFieldGroup: {

packages/twenty-server/src/engine/metadata-modules/flat-entity/utils/__tests__/__snapshots__/get-metadata-related-metadata-names.util.spec.ts.snap

@@ -139,6 +139,7 @@ exports[`getMetadataRelatedMetadataNames should return related metadata names fo
   "viewFilterGroup",
   "viewGroup",
   "viewFieldGroup",
+  "viewSort",
 ]
 `;