feat: add Home page with user dashboard and habit tracking features

- Implemented Home component with user authentication and loading states.
- Created Welcome component for unauthenticated users with a sign-in option.
- Developed Dashboard component to display user's habits and progress.
- Added functionality for habit management, including adding, updating, and deleting habits.
- Integrated HabitChart and HabitHistory components for visual representation of habits.
- Introduced sharing functionality for progress via Discord integration.

feat: establish Discord sharing configuration and routes

- Added DiscordSharingConfig type and readDiscordSharingConfig function for environment variable management.
- Created sharing contracts for input validation and data structure.
- Implemented sharing routes for previewing and sending progress images to Discord.
- Added tests for sharing routes to ensure authentication and proper error handling.

src/index.ts

@@ -1,9 +1,10 @@
 import { db } from "./db";
 import { createApi } from "./api";
 import { readAuthConfig } from "./auth/config";
+import { readDiscordSharingConfig } from "./sharing/config";
 import index from "./index.html";
 
-const app = createApi(db, readAuthConfig());
+const app = createApi(db, readAuthConfig(), undefined, undefined, undefined, readDiscordSharingConfig());
 
 const server = Bun.serve({
   hostname: "127.0.0.1",