refactor: remove "core" naming from views and eliminate converter layer (#18667)

## Summary

- **Remove all "core" prefixes** from the views system — the
metadata-based storage migration is complete, so `CoreView`,
`coreViewsSelector`, `getCoreViews`, etc. are now just `View`,
`viewsSelector`, `getViews`
- **Eliminate the entire converter layer** (15 files, ~850 lines
deleted) — `convertCoreViewToView` and all sub-converters were either
no-ops or trivially adding `__typename` / mapping identical enum values.
Local enums now re-export from generated GraphQL types directly (single
source of truth)
- **Unify `View` and `ViewWithRelations`** into one type —
`ViewWithRelations` is now a type alias for `View`, selectors return
data directly without conversion

### Backend
- Rename `@ObjectType('CoreView')` → `@ObjectType('View')` (and all
sub-entities)
- Rename resolver methods: `getCoreViews` → `getViews`, `createCoreView`
→ `createView`, etc.
- Rename `FIND_ALL_CORE_VIEWS_GRAPHQL_OPERATION` →
`FIND_ALL_VIEWS_GRAPHQL_OPERATION`

### Frontend
- Delete 15 converter files (`convertGqlView*ToView*`,
`convertView*ToGql`, `convertViewWithRelationsToView`)
- Re-export `ViewType`, `ViewKey`, `ViewFilterGroupLogicalOperator` from
generated enums (no more duplicate enum definitions with different
casing)
- Replace `ViewOpenRecordInType` with `ViewOpenRecordIn` from generated
- Remove `__typename` from all local view sub-types
- Remove unused `variant` from `ViewFilter`, make `displayValue` and
`definition` optional
- Rename ~45 GraphQL query/mutation files and all selectors to drop
"core" prefix
- Delete unused `viewsWithRelationsSelector`

packages/twenty-server/src/engine/workspace-manager/workspace-migration/workspace-migration-runner/services/workspace-migration-runner.service.ts

@@ -12,7 +12,7 @@ import { getMetadataFlatEntityMapsKey } from 'src/engine/metadata-modules/flat-e
 import { getMetadataRelatedMetadataNamesForValidation } from 'src/engine/metadata-modules/flat-entity/utils/get-metadata-related-metadata-names-for-validation.util';
 import { getMetadataRelatedMetadataNames } from 'src/engine/metadata-modules/flat-entity/utils/get-metadata-related-metadata-names.util';
 import { getMetadataSerializedRelationNames } from 'src/engine/metadata-modules/flat-entity/utils/get-metadata-serialized-relation-names.util';
-import { FIND_ALL_CORE_VIEWS_GRAPHQL_OPERATION } from 'src/engine/metadata-modules/view/constants/find-all-core-views-graphql-operation.constant';
+import { FIND_ALL_VIEWS_GRAPHQL_OPERATION } from 'src/engine/metadata-modules/view/constants/find-all-views-graphql-operation.constant';
 import { WorkspaceMetadataVersionService } from 'src/engine/metadata-modules/workspace-metadata-version/services/workspace-metadata-version.service';
 import { WorkspaceCacheStorageService } from 'src/engine/workspace-cache-storage/workspace-cache-storage.service';
 import { WorkspaceCacheService } from 'src/engine/workspace-cache/services/workspace-cache.service';
@@ -66,16 +66,16 @@ export class WorkspaceMigrationRunnerService {
       'flatViewFieldMaps',
       'flatViewFilterGroupMaps',
     ];
-    const shouldInvalidFindCoreViewsGraphqlCacheOperation =
+    const shouldInvalidateFindViewsGraphqlCacheOperation =
       viewRelatedFlatMapsKeys.some((key) => flatMapsKeysSet.has(key));
 
     if (
-      shouldInvalidFindCoreViewsGraphqlCacheOperation ||
+      shouldInvalidateFindViewsGraphqlCacheOperation ||
       shouldIncrementMetadataGraphqlSchemaVersion
     ) {
       asyncOperations.push(
         this.workspaceCacheStorageService.flushGraphQLOperation({
-          operationName: FIND_ALL_CORE_VIEWS_GRAPHQL_OPERATION,
+          operationName: FIND_ALL_VIEWS_GRAPHQL_OPERATION,
           workspaceId,
         }),
       );