Add Claude Code settings and alias

- Add cc alias for claude --internet
- Add Claude settings.json with plugins and statusline config
- Add custom statusline.sh script with context usage display

dot_claude/settings.json

@@ -0,0 +1,17 @@
+{
+  "env": {
+    "DISABLE_AUTOUPDATER": "1"
+  },
+  "statusLine": {
+    "type": "command",
+    "command": "~/.claude/statusline.sh",
+    "padding": 0
+  },
+  "enabledPlugins": {
+    "code-simplifier@claude-plugins-official": true,
+    "llm-rules@Meta": true,
+    "meta@Meta": true,
+    "ralph-loop@claude-plugins-official": true,
+    "trajectory@Meta": true
+  }
+}