fix(hooks): remove hooks, rely on skill descriptions for activation

Hooks with command type not suitable for skills-dir plugins.
All 26 skills have MANDATORY — always active descriptions that
auto-trigger based on context, code, and project files.

hooks/hooks.json

@@ -1,23 +0,0 @@
-{
-  "hooks": {
-    "SessionStart": [{
-      "matcher": "startup|resume|compact",
-      "hooks": [{
-        "type": "command",
-        "command": "\"${CLAUDE_PLUGIN_ROOT}/hooks/scripts/detect-project.sh\"",
-        "shell": "bash",
-        "timeout": 10,
-        "async": false
-      }]
-    }],
-    "PreToolUse": [{
-      "matcher": "Write|Edit",
-      "hooks": [{
-        "type": "command",
-        "command": "\"${CLAUDE_PLUGIN_ROOT}/hooks/scripts/detect-file-type.sh\"",
-        "shell": "bash",
-        "timeout": 10
-      }]
-    }]
-  }
-}