refactor(aidd-context): simplify skill generation rules

[alexsoyes]

🎯 What & why

Keep skill authoring concise: integrate observable checks into the process and reserve optional rules for constraints. Extracted from #1027 without changing its agent workflows.

🛠️ How it works

• Contract: replace separate Test sections with Process checks and optional Rules.
• Templates: align the generator actions and scaffolds; retain confirmation, path boundaries, read-back, and repair checks.
• Wording: bold important opening words in bullets without procedural labels; keep one canonical home per rule and prefer positive instructions to never.

🧪 How to verify

• Static checks: node scripts/check-architecture-rules.js passes; commit hooks pass 681 script tests. The CLI suite passes 7,025 tests, one skipped.
• Scope: nine files under 04-skill-generate plus its architecture sentence. No agent, implementation, or reload changes.
• Runtime: a new generated skill was not exercised for this extraction.

🔗 Linked issue

Refs #983. Split from #1027; both target next independently.

✅ I certify

• I DO CERTIFY I READ EACH LINE OF THE PULL REQUEST BECAUSE I AM A SOFTWARE ENGINEER, NOT A AI PUPPY.