feat: add live Discord sharing functionality with dynamic habit progress images

- Implemented live card image generation for user habits using canvas.
- Created API endpoints for starting and managing live Discord sharing sessions.
- Added tests for live Discord sharing to ensure functionality and reliability.
- Introduced CSS styles for the live Discord sharing interface.
- Enhanced error handling and state management for Discord message updates.

drizzle/0009_purple_wasp.sql

@@ -0,0 +1,7 @@
+CREATE TABLE `live_cards` (
+	`user_id` text PRIMARY KEY NOT NULL,
+	`token` text NOT NULL,
+	FOREIGN KEY (`user_id`) REFERENCES `users`(`id`) ON UPDATE no action ON DELETE cascade
+);
+--> statement-breakpoint
+CREATE UNIQUE INDEX `live_cards_token_unique` ON `live_cards` (`token`);