feat: initial commit - ultra-simple claude code switcher

- Core ccs bash script with profile switching
- Installation script with PATH verification
- Example config template
- Comprehensive README with troubleshooting
- Security: input validation, injection prevention
- MIT license

.ccs.example.json

@@ -0,0 +1,8 @@
+{
+  "profiles": {
+    "glm": "~/.claude/glm.settings.json",
+    "sonnet": "~/.claude/sonnet.settings.json",
+    "opus": "~/.claude/opus.settings.json",
+    "default": "~/.claude/settings.json"
+  }
+}