feat: add viswam signup fields and move detailed signup fields to profile completion page

Description:

This PR refactors the user onboarding process by splitting the signup into two stages: a simplified initial registration followed by a mandatory profile completion step.

Key changes:

• Simplified Signup: Removed detailed fields (email, gender, DOB, location) from the initial signup form in LoginForm.tsx to reduce friction.
• Mandatory Profile Completion: Added CompleteProfilePage.tsx and integrated it into the application routing. Users are now prompted to complete their profile after initial registration.
• Enhanced Profile Management: Updated UserProfileInfo.tsx to support comprehensive user data, including:
  • Multiple places lived.
  • Social media platform links (X, Instagram, LinkedIn, etc.).
  • Standardized options for occupations, languages, and proficiencies.
• New UI Components: Introduced SearchableSelect.tsx for better handling of long selection lists.
• Standardized Constants: Added src/lib/profileConstants.ts containing exhaustive lists for languages, occupations, and education levels.
• Test Coverage: Updated and expanded test suites for UserProfileInfo, LoginForm, and useAuth to reflect the new flow and data structures.

Type of Change:

• Bug Fix
• Feature Development
• Documentation

Testing:

• Tested on desktop
• Tested on mobile
• Tested in different browsers

Checklist:

• Code follows project style guidelines
• Self-review completed
• No console errors
• TypeScript types are correct