Common API - create common find one query (#14720)

closes https://github.com/twentyhq/core-team-issues/issues/1418

Tested : 
- findOne on Rest and Gql

### Vision
#### Common
- Common is kind of renamed Gql base resolver
- Common handles args (filter, values, ...) validation
- Common accepts depth or raw gql selected fields to compute
selectedFields
- Common is directly called by each CommonQueries (findOne, ...)
service, which extend CommonBaseQuery service
- Common sequence : 
| - Parse & Validate args (args-handlers, to create)
| - Build query (query-parsers : currently in gql-query-parsers, to
move)
| - Execute query
| - Fetch relation + format
#### Rest
- Simple parsing (without metadata validation)
- Calling Common API
- Simple rest response formatting
#### Gql
- Calling Common API

packages/twenty-server/src/engine/workspace-manager/dev-seeder/core/utils/seed-feature-flags.util.ts

@@ -56,6 +56,11 @@ export const seedFeatureFlags = async (
         workspaceId: workspaceId,
         value: workspaceId === SEED_APPLE_WORKSPACE_ID,
       },
+      {
+        key: FeatureFlagKey.IS_COMMON_API_ENABLED,
+        workspaceId: workspaceId,
+        value: false,
+      },
       {
         key: FeatureFlagKey.IS_PAGE_LAYOUT_ENABLED,
         workspaceId: workspaceId,