refactor: update sessionStart hook to inject all best-practice guides and enhance documentation

.claude-plugin/plugin.json

@@ -6,6 +6,5 @@
     "name": "Asep Haryana Saputra",
     "email": "asepharyana@users.noreply.github.com"
   },
-  "keywords": ["best-practice", "clean-code", "engineering-guide", "programming-standards", "architecture"],
-  "skills": "./skills/"
+  "keywords": ["best-practice", "clean-code", "engineering-guide", "programming-standards", "architecture"]
 }