chore(auth): upgrade to Auth.js v5 #916

[ankitmukhia]

PR Fixes:

• migrated to Auth.js v5
• replaced bcrypt with bcryptjs to ensure edge runtime compatibility

Resolves #916

Checklist before requesting a review

• [x] I have performed a self-review of my code
• [x] I assure there is no similar/duplicate pull request regarding same issue

[ankitmukhia]

can you look into it @siinghd @hkirat , see if it looks promising

new login form