feat: add YouTube social link to user profiles (#114)

* feat: add YouTube social link to user profiles

- Add youtube_url column to auth_users schema
- Add DB migration for the new column
- Update updateProfile action with YouTube URL validation
- Update getUserProfile and getPublicProfile to include youtubeUrl
- Add YouTube input field to settings page
- Display YouTube icon on public profile pages

* fix: use drizzle-kit generate for youtube_url migration

Replaces manually created migration with proper drizzle-kit generated
migration that includes meta snapshot and journal entry.

---------

Co-authored-by: Anton Pascal <anton-pascal@users.noreply.github.com>

packages/db/src/schema/auth/users.ts

@@ -19,6 +19,8 @@ export const users = pgTable(
     githubUrl: t.text('github_url'),
     /** X/Twitter profile URL */
     xUrl: t.text('x_url'),
+    /** YouTube channel URL */
+    youtubeUrl: t.text('youtube_url'),
     /** Whether the user wants to receive email notifications about new features and updates */
     emailNotifications: t.boolean('email_notifications').notNull().default(true),
     role: userRoles('role').notNull().default('user'),