Rename webhook and open api urls (#11684)

We want to have fewer base path for routing.

We will have:
- /files
- /webhooks
- /graphql
- /metadata
- /rest
- /auth
- /healthz

I'm moving /open-api under /rest, and centralizing the webhooks
(removing /stripe and /cloudflare)

packages/twenty-server/src/engine/core-modules/open-api/open-api.controller.ts

@@ -4,11 +4,11 @@ import { Request, Response } from 'express';
 
 import { OpenApiService } from 'src/engine/core-modules/open-api/open-api.service';
 
-@Controller('open-api')
+@Controller()
 export class OpenApiController {
   constructor(private readonly openApiService: OpenApiService) {}
 
-  @Get('core')
+  @Get(['open-api/core', 'rest/open-api/core'])
   async generateOpenApiSchemaCore(
     @Req() request: Request,
     @Res() res: Response,
@@ -18,7 +18,7 @@ export class OpenApiController {
     res.send(data);
   }
 
-  @Get('metadata')
+  @Get(['open-api/metadata', 'rest/open-api/metadata'])
   async generateOpenApiSchemaMetaData(
     @Req() request: Request,
     @Res() res: Response,