feat: add triggers to all 38 skill templates

Multi-word, skill-specific trigger keywords for GBrain's RESOLVER.md
router. Each skill gets 3-6 triggers derived from its "Use when asked
to..." description text. Avoids single generic words that would collide
across skills (e.g., "debug this" not "debug").

These are distinct from voice-triggers (speech-to-text aliases) and
serve GBrain's checkResolvable() validation.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

careful/SKILL.md.tmpl

@@ -7,6 +7,10 @@ description: |
   User can override each warning. Use when touching prod, debugging live systems,
   or working in a shared environment. Use when asked to "be careful", "safety mode",
   "prod mode", or "careful mode". (gstack)
+triggers:
+  - be careful
+  - warn before destructive
+  - safety mode
 allowed-tools:
   - Bash
   - Read