feat: add uv plugin to marketplace

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

plugins/uv/.claude-plugin/plugin.json

@@ -0,0 +1,8 @@
+{
+  "name": "uv",
+  "version": "0.1.0",
+  "description": "uv statt pip/python/venv: Skripte mit uv run, Deps mit uv add, inline Script-Metadata für Standalone-Skripte.",
+  "author": {
+    "name": "inmedias.it"
+  }
+}