Introduce standalone page (#19675)

Add support for standalone pages: a new `PageLayout` type
(`STANDALONE_PAGE`) that can be rendered independently at
`/page/:pageLayoutId`, not tied to any record or object context.

- New `STANDALONE_PAGE` page layout type
- New `PAGE_LAYOUT` navigation menu item type: adds a `pageLayoutId`
foreign key to `NavigationMenuItemEntity`, allowing sidebar items to
link directly to standalone pages
- New `GLOBAL_OBJECT_CONTEXT` command menu availability type: separates
object-context-dependent commands (Create Record, Import, Export, See
Deleted, Create View, Hide Deleted) from truly global ones, so
standalone pages only show relevant commands
- Frontend routing & rendering: adds a `/page/:pageLayoutId` route with
its own page component, header, and command menu
- Widget rendering refactor
- Instance commands: two fast 1.22 migrations: `pageLayoutId` column +
`STANDALONE_PAGE` enum, and `GLOBAL_OBJECT_CONTEXT` availability type
enum
- Workspace command: backfills existing command menu items from `GLOBAL`
to `GLOBAL_OBJECT_CONTEXT` where appropriate
- Dev seeds: adds a sample "Star History" standalone page with an iframe
widget for local development

packages/twenty-shared/src/utils/command-menu-items/__tests__/evaluateConditionalAvailabilityExpression.test.ts

@@ -1,13 +1,10 @@
-import {
-  CommandMenuContextApiPageType,
-  type CommandMenuContextApi,
-} from '@/types';
+import { ContextStorePageType, type CommandMenuContextApi } from '@/types';
 import { evaluateConditionalAvailabilityExpression } from '../evaluateConditionalAvailabilityExpression';
 
 const buildContext = (
   overrides: Partial<CommandMenuContextApi> = {},
 ): CommandMenuContextApi => ({
-  pageType: CommandMenuContextApiPageType.INDEX_PAGE,
+  pageType: ContextStorePageType.Index,
   isInSidePanel: false,
   isPageInEditMode: false,
   favoriteRecordIds: [],

packages/twenty-shared/src/utils/command-menu-items/__tests__/interpolateCommandMenuItemTemplate.test.ts

@@ -1,13 +1,10 @@
-import {
-  CommandMenuContextApiPageType,
-  type CommandMenuContextApi,
-} from '@/types';
+import { ContextStorePageType, type CommandMenuContextApi } from '@/types';
 import { interpolateCommandMenuItemTemplate } from '../interpolateCommandMenuItemTemplate';
 
 const buildContext = (
   overrides: Partial<CommandMenuContextApi> = {},
 ): CommandMenuContextApi => ({
-  pageType: CommandMenuContextApiPageType.INDEX_PAGE,
+  pageType: ContextStorePageType.Index,
   isInSidePanel: false,
   isPageInEditMode: false,
   favoriteRecordIds: [],