Extract 4 hardcoded templates from prep.go raw strings into
pkg/prompts/lib/templates/ as markdown files:
- coding.md — main coding template with closeout sequence
- conventions.md — convention audit (report only)
- security.md — security review
- verify.md — PR verification
- default.md — fallback
prep.go now calls prompts.Template("coding") instead of
maintaining 120 lines of raw Go string literals.
Backticks now work properly in templates — no more
concatenation hacks for inline code formatting.
Co-Authored-By: Virgil <virgil@lethean.io>
a1c2ed2376