feat: implement friendship system with requests and management features

- Added a new friendship table schema to manage friend requests and relationships.
- Updated profile page to include tabs for managing friends, incoming requests, and outgoing requests.
- Implemented functionality to send, accept, decline, cancel, and remove friend requests.
- Enhanced user experience with feedback messages for friend request actions.

drizzle/0008_skinny_warpath.sql

@@ -0,0 +1,12 @@
+CREATE TABLE `friendship` (
+	`id` text PRIMARY KEY NOT NULL,
+	`requesterId` text NOT NULL,
+	`addresseeId` text NOT NULL,
+	`status` text DEFAULT 'pending' NOT NULL,
+	`createdAt` integer NOT NULL,
+	`updatedAt` integer NOT NULL,
+	FOREIGN KEY (`requesterId`) REFERENCES `user`(`id`) ON UPDATE no action ON DELETE cascade,
+	FOREIGN KEY (`addresseeId`) REFERENCES `user`(`id`) ON UPDATE no action ON DELETE cascade
+);
+--> statement-breakpoint
+CREATE UNIQUE INDEX `friendship_requesterId_addresseeId_unique` ON `friendship` (`requesterId`,`addresseeId`);