Workspace prep now detects repo language and copies the right CODEX.md:
- Go repos get CODEX.md.tmpl (existing — Core primitives, banned imports)
- PHP repos get CODEX-PHP.md.tmpl (CorePHP patterns, lifecycle events,
Actions, BelongsToWorkspace, Flux Pro, FA Pro, UK English)
Added lib.WorkspaceFile() helper for reading individual template files.
Co-Authored-By: Virgil <virgil@lethean.io>
