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/engine/workspace-manager/twenty-standard-application/utils/field-metadata/compute-note-standard-flat-field-metadata.util.ts

@@ -151,7 +151,7 @@ export const buildNoteStandardFlatFieldMetadatas = ({
     workspaceId,
     context: {
       fieldName: 'bodyV2',
-      type: FieldMetadataType.RICH_TEXT_V2,
+      type: FieldMetadataType.RICH_TEXT,
       label: 'Body',
       description: 'Note body',
       icon: 'IconFilePencil',

packages/twenty-server/src/engine/workspace-manager/twenty-standard-application/utils/field-metadata/compute-task-standard-flat-field-metadata.util.ts

@@ -152,7 +152,7 @@ export const buildTaskStandardFlatFieldMetadatas = ({
     workspaceId,
     context: {
       fieldName: 'bodyV2',
-      type: FieldMetadataType.RICH_TEXT_V2,
+      type: FieldMetadataType.RICH_TEXT,
       label: 'Body',
       description: 'Task body',
       icon: 'IconFilePencil',

packages/twenty-server/src/engine/workspace-manager/twenty-standard-application/utils/skill-metadata/create-standard-flat-skill-metadata.util.ts

@@ -367,7 +367,7 @@ You help users manage their workspace data model by creating, updating, and orga
 - **CURRENCY**: Monetary values
 - **RATING**: Star ratings
 - **RELATION**: Links to other objects
-- **RICH_TEXT_V2**: Formatted rich text content
+- **RICH_TEXT**: Formatted rich text content
 
 ## Best Practices