feat: rename RICH_TEXT_V2 → RICH_TEXT in codebase (keep DB value) (#18628)

## Summary

- Renames the `FieldMetadataType` enum key from `RICH_TEXT_V2` to
`RICH_TEXT` across the entire codebase, while keeping the underlying
string value as `'RICH_TEXT_V2'` to maintain PostgreSQL database
compatibility
- Renames all related types, guards, hooks, components, and files from
`*RichTextV2*` / `*rich-text-v2*` to `*RichText*` / `*rich-text*` (e.g.
`FormRichTextV2FieldInput` → `FormRichTextFieldInput`,
`isFieldRichTextV2` → `isFieldRichText`)
- Updates generated files (GraphQL schema, SDK types) to use the new key
while preserving the `RICH_TEXT_V2` string value for DB/API layer
- Updates i18n locale files, test snapshots, and integration tests to
reflect the rename

## Context

The legacy `RICH_TEXT` (V1) field type was deprecated and migrated to
`TEXT` in a previous PR (#18623). With V1 gone, the `RICH_TEXT_V2`
naming is no longer necessary — `RICH_TEXT` is now the canonical name.
The DB enum value stays `'RICH_TEXT_V2'` to avoid confusion with the
just-deprecated V1 type and to prevent a database migration.

## Test plan

- [x] `twenty-server` typecheck passes
- [x] `twenty-front` typecheck passes (only pre-existing Apollo client
errors remain)
- [x] `twenty-server` lint passes
- [x] `twenty-front` lint passes
- [x] `twenty-shared` build passes
- [ ] CI passes


Made with [Cursor](https://cursor.com)

packages/twenty-server/src/modules/task/standard-objects/task.workspace-entity.ts

@@ -1,7 +1,7 @@
 import {
   type ActorMetadata,
   FieldMetadataType,
-  type RichTextV2Metadata,
+  type RichTextMetadata,
 } from 'twenty-shared/types';
 
 import { BaseWorkspaceEntity } from 'src/engine/twenty-orm/base.workspace-entity';
@@ -18,13 +18,13 @@ const BODY_V2_FIELD_NAME = 'bodyV2';
 
 export const SEARCH_FIELDS_FOR_TASKS: FieldTypeAndNameMetadata[] = [
   { name: TITLE_FIELD_NAME, type: FieldMetadataType.TEXT },
-  { name: BODY_V2_FIELD_NAME, type: FieldMetadataType.RICH_TEXT_V2 },
+  { name: BODY_V2_FIELD_NAME, type: FieldMetadataType.RICH_TEXT },
 ];
 
 export class TaskWorkspaceEntity extends BaseWorkspaceEntity {
   position: number;
   title: string | null;
-  bodyV2: RichTextV2Metadata | null;
+  bodyV2: RichTextMetadata | null;
   dueAt: Date | null;
   status: string | null;
   createdBy: ActorMetadata;