feat: Initialize Discord-style AI chat project

Sets up the project structure, dependencies, and basic configuration for a Discord-inspired AI chat application. Includes placeholder components and types, Vite configuration for local development, and basic styling for a dark theme and custom scrollbars. Integrates Gemini API key handling and a service for sending messages.

.gitignore

@@ -0,0 +1,24 @@
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+lerna-debug.log*
+
+node_modules
+dist
+dist-ssr
+*.local
+
+# Editor directories and files
+.vscode/*
+!.vscode/extensions.json
+.idea
+.DS_Store
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?