refactor: remove Makefile, restructure as knowledge-first framework

The primary value is the knowledge layer (markdown files that any agent
reads — Crush, OpenWebUI, Hermes, Conduit on iPhone). CLI tooling
(scripts, git hooks) is optional, for projects that use git/docker.

Changes:
- Remove Makefile entirely. All commands are now direct script invocations
  (bash scripts/check-rules.sh, bash scripts/setup-hooks.sh, etc.)
- Add scripts/test.sh stub (replaces make test)
- check-rules.sh: test-suite check now calls scripts/test.sh, not make test
- Rewrite README as three-layer architecture: knowledge → git hooks → docker
- Update all docs (AGENTS.md, BASELINE-PROMPT.md, ADOPTING.md, PATTERNS.md,
  STATUS.md) to remove every make reference

The framework now works for:
- CLI/harness users (git hooks + scripts + AGENTS.md)
- Non-CLI users (BASELINE-PROMPT.md loaded into any agent's system prompt)

💘 Generated with Crush

Assisted-by: Crush via Crush <crush@charm.land>

BASELINE-PROMPT.md

@@ -83,7 +83,7 @@
 
 - Run a routine **gardening loop.** Agents are disciplined with code but tend to sprawl `.md` files everywhere.
 - Keep docs, code, and tests in sync at all times.
-- `make garden` reports `.md` sprawl and files that should be migrated to Discourse.
+- `scripts/garden.sh` reports `.md` sprawl and files that should be migrated to Discourse.
 
 ## 12. Sub-agents as subcontractors