[FRONT COMPONENTS] Introduce conditionalAvailabilityExpression to command menu items (#18319)

## PR Description

- Uses `expr-eval` to enable front components (SDK plugins) to define
conditional availability as declarative expressions.
- Moves shared types and constants to `twenty-shared`
- Introduces a `conditionalAvailabilityExpression` field on
`CommandMenuItemEntity`, allowing command menu items to store an
`expr-eval` compatible expression string that is evaluated against a
CommandMenuContext to determine if the item should be shown.
- Creates an esbuild transform plugin
`conditional-availability-transform-plugin` in `twenty-sdk` that
converts TypeScript conditional availability expressions into
`expr-eval` compatible syntax at build time, so SDK developers can write
natural TS expressions that get transformed to evaluable strings.
- Removes deprecated `forceRegisteredActionsByKey` state and its usage.
- Creates `useCommandMenuContext` hook that builds the full
`CommandMenuContext` object from React state, which is then passed to
`useCommandMenuItemFrontComponentActions` for evaluating conditional
availability expressions.

packages/twenty-server/src/engine/workspace-manager/workspace-migration/constant/default-feature-flags.ts

@@ -1,4 +1,4 @@
-import { FeatureFlagKey } from 'src/engine/core-modules/feature-flag/enums/feature-flag-key.enum';
+import { FeatureFlagKey } from 'twenty-shared/types';
 
 export const DEFAULT_FEATURE_FLAGS = [
   FeatureFlagKey.IS_ATTACHMENT_MIGRATED,

packages/twenty-server/src/engine/workspace-manager/workspace-migration/workspace-migration-builder/validators/services/flat-page-layout-widget-validator.service.ts

@@ -3,13 +3,13 @@ import { Injectable } from '@nestjs/common';
 import { msg, t } from '@lingui/core/macro';
 import { ALL_METADATA_NAME } from 'twenty-shared/metadata';
 import {
+  FeatureFlagKey,
   PageLayoutTabLayoutMode,
   PageLayoutWidgetPosition,
   type GridPosition,
 } from 'twenty-shared/types';
 import { isDefined } from 'twenty-shared/utils';
 
-import { FeatureFlagKey } from 'src/engine/core-modules/feature-flag/enums/feature-flag-key.enum';
 import { findFlatEntityByUniversalIdentifier } from 'src/engine/metadata-modules/flat-entity/utils/find-flat-entity-by-universal-identifier.util';
 import { FlatPageLayoutWidgetTypeValidatorService } from 'src/engine/metadata-modules/flat-page-layout-widget/services/flat-page-layout-widget-type-validator.service';
 import { PageLayoutTabExceptionCode } from 'src/engine/metadata-modules/page-layout-tab/exceptions/page-layout-tab.exception';