Colocation ↔ Next 13 /app can colocate all files

aka Collocate, Collocates

References

1. Move Data Fetch to Server-Side ↔ ( Next 13 ) to Collocate Data Fetch ops in Server Component for Sync perf

2. to eliminate data fetch ↔ Collocate on Server Component for Synchronous access

3. /app ↔ ( Next 13 ) dir to export Page, allows Colocation