feat(kyberforge): add skill-author, merging skill-write and skill-improve

Closes #5. Single authoring skill replaces the factory trio — one set of
standards, one script, one place for future governance rules. Routes to
create or improve flow based on context. Passes skill-audit with no findings.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016z2ZFYHQCex8yZAMVMTZzZ

plugins/kyberforge/skills/skill-author/assets/templates/README.md

@@ -0,0 +1,51 @@
+# SKILL_NAME
+
+<!-- FILL IN: One sentence describing what this skill does. -->
+
+## What it does
+
+<!-- FILL IN: 2–4 sentences. What task does this skill handle?
+     What does the agent produce or accomplish when it runs? -->
+
+## Before you start
+
+<!-- FILL IN: List any prerequisites the user should have ready.
+     Examples: research docs, a grill session, specific input files, credentials.
+     Delete this section if the skill has no meaningful prerequisites. -->
+
+## Usage
+
+```
+/SKILL_NAME
+```
+
+<!-- FILL IN: Add any required or common arguments.
+     If the skill takes no arguments, delete the code block above and just keep the slash command. -->
+
+<!-- OPTIONAL: Manual (human) workflow — include if the skill bundles scripts a human can run directly.
+
+**Manual workflow:**
+```bash
+# FILL IN: step-by-step commands
+```
+-->
+
+## Files
+
+<!-- FILL IN: List each file individually. Remove rows for directories you deleted.
+     Replace the example rows below with your actual files. -->
+
+| File | Purpose |
+|------|---------|
+| `SKILL.md` | Skill instructions for agents |
+| `scripts/your-script.sh` | FILL IN: what this script does |
+| `references/your-doc.md` | FILL IN: what this reference covers |
+| `assets/your-asset.json` | FILL IN: what this asset is |
+| `tests/your-test.bats` | FILL IN: what this test covers |
+
+<!-- OPTIONAL: Spec reference — include if this skill implements or follows an external standard.
+
+## Spec reference
+
+[FILL IN: Spec name](FILL IN: URL)
+-->