feat: add kyberforge plugin and rename plugin-create skill

Scaffolds the kyberforge marketplace management plugin (create-plugin and
marketplace-architect skills will live here). Renames the plugin-create
skill directory to create-plugin to match the canonical kebab-order convention.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

plugins/kyberforge/README.md

@@ -0,0 +1,42 @@
+# kyberforge
+
+Skills and agents for creating, maintaining, and managing a Claude Code / Copilot CLI plugin marketplace.
+
+## Install
+
+**Claude Code:**
+
+```bash
+claude plugin marketplace add <owner>/<repo>
+claude plugin install kyberforge@<marketplace-name>
+```
+
+**GitHub Copilot CLI:**
+
+```bash
+copilot plugin marketplace add <owner>/<repo>
+copilot plugin install kyberforge
+```
+
+**Local (development):**
+
+```bash
+# Claude Code
+claude --plugin-dir ./plugins/kyberforge
+
+# GitHub Copilot CLI
+copilot plugin install ./plugins/kyberforge
+```
+
+## Contents
+
+| Component | Path | Description |
+|---|---|---|
+| Skills | `skills/` | Slash commands available after install |
+| Agents | `agents/` | Role-based agents (`.md` for Claude, `.agent.md` for Copilot) |
+| Hooks | `hooks/hooks.json` (Claude) / `hooks.json` (Copilot) | Event-triggered automation |
+| MCP servers | `.mcp.json` | Model Context Protocol server definitions |
+
+## Author
+
+Defame1297