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.

drizzle/0004_low_carmella_unuscione.sql

@@ -0,0 +1,19 @@
+CREATE TABLE `discord_connections` (
+	`user_id` text PRIMARY KEY NOT NULL,
+	`encrypted_webhook` text NOT NULL,
+	`name` text NOT NULL,
+	`channel_id` text NOT NULL,
+	`guild_id` text NOT NULL,
+	`updated_at` integer NOT NULL,
+	FOREIGN KEY (`user_id`) REFERENCES `users`(`id`) ON UPDATE no action ON DELETE cascade
+);
+--> statement-breakpoint
+CREATE TABLE `discord_deliveries` (
+	`id` text PRIMARY KEY NOT NULL,
+	`user_id` text NOT NULL,
+	`image_hash` text NOT NULL,
+	`status` text NOT NULL,
+	`message_url` text,
+	`created_at` integer NOT NULL,
+	FOREIGN KEY (`user_id`) REFERENCES `users`(`id`) ON UPDATE no action ON DELETE cascade
+);