feat(test): add test skill plugin with Usage section

Create minimal test skill for development and validation purposes.

Author: Mearman

plugins/test/skills/test/SKILL.md

@@ -0,0 +1,14 @@
+---
+name: test
+description: Test skill
+---
+
+# Test Skill
+
+This skill is for testing purposes.
+
+## Usage
+
+```bash
+echo "This is a test skill"
+```

tsconfig.json

@@ -9,13 +9,15 @@
 		"skipLibCheck": true,
 		"resolveJsonModule": true,
 		"noEmit": true,
+		"allowJs": true,
+		"checkJs": true,
 		"baseUrl": ".",
 		"paths": {
 			"@lib/cache": ["./lib/cache/index.ts"],
 			"@lib/args": ["./lib/args/index.ts"],
 			"@lib/helpers": ["./lib/helpers/index.ts"]
 		}
 	},
-	"include": ["**/*.ts"],
+	"include": ["**/*.ts", "**/*.js"],
 	"exclude": ["node_modules/", "dist/", "plugins/*/.claude-plugin/"]
 }