fix(hub-guide): correct hooks.json format and remove redundant manifest field

- hooks.json needs 'hooks' wrapper key at top level
- Remove 'hooks' field from plugin.json (auto-discovered from hooks/hooks.json)
- Simplify hook entries (no nested hooks array)

.claude-plugin/plugin.json

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

hooks/hooks.json

@@ -1,17 +1,15 @@
 {
+  "hooks": {
     "SessionStart": [{
-    "hooks": [{
       "type": "command",
       "command": "bash \"$CLAUDE_PLUGIN_ROOT/hooks/scripts/detect-project.sh\"",
       "timeout": 10
-    }]
     }],
     "PreToolUse": [{
       "matcher": "Write|Edit",
-    "hooks": [{
       "type": "command",
       "command": "bash \"$CLAUDE_PLUGIN_ROOT/hooks/scripts/detect-file-type.sh\" \"$TOOL_INPUT\"",
       "timeout": 10
     }]
-  }]
+  }
 }