feat: introduce archify skill for generating architecture diagrams

- Added a new Archify skill, enabling users to create polished architecture, workflow, sequence, data-flow, and lifecycle diagrams.
- Implemented comprehensive functionality including rendering, validation, and delivery of diagrams in various formats.
- Integrated a user-friendly command-line interface for generating and previewing diagrams.
- Developed supporting files including package.json, LICENSE, and SKILL.md for documentation and licensing.
- Added unit tests to ensure reliability and functionality of the new skill.

These changes enhance the application by providing a structured approach to visualizing system architecture and workflows, improving user experience and data representation.

.agents/skills/archify/skill-release.json

@@ -0,0 +1,10 @@
+{
+  "schemaVersion": 1,
+  "skillId": "archify",
+  "channel": "stable",
+  "version": "2.16.0",
+  "source": {
+    "repository": "https://github.com/tt-a1i/archify"
+  },
+  "updateManifestUrl": "https://tt-a1i.github.io/archify/skill-updates/archify/stable.json"
+}