feat: add AI command suggestions extension for Tiptap editor

- Implemented Commands plugin to handle command suggestions triggered by '@' character.
- Created suggestion configuration to filter and render command items.
- Added various command items including date, time, formatting, templates, and task management commands.
- Introduced CSS styles for the Tiptap editor to enhance UI.
- Configured TypeScript settings and Vite build for the project.

tsconfig.json

@@ -0,0 +1,20 @@
+{
+  "extends": "@kevisual/types/json/frontend.json",
+  "compilerOptions": {
+    "baseUrl": ".",
+    "strict": false,
+    "paths": {
+      "@/*": [
+        "./src/*"
+      ],
+      "@/agent": [
+        "./src/agent"
+      ]
+    },
+  },
+  "include": [
+    "src/**/*",
+    "agent/**/*",
+    "typings.d.ts"
+  ],
+}