Add LinkedIn profile import

[aravikishan]

Feature Request

Allow users to import their LinkedIn profile data to auto-populate resume fields. This would dramatically speed up the resume creation process.

Proposed flow

1. User clicks "Import from LinkedIn"
2. OAuth authentication with LinkedIn
3. Pull profile data (experience, education, skills, certifications)
4. Map to ResumeAI template fields
5. User reviews and edits before finalizing

Technical notes

• LinkedIn API v2 supports profile data export
• Need to handle rate limits (100 calls/day for basic tier)
• Should also support manual PDF upload of LinkedIn profile export as fallback