add GSSoC assignment FAQ

[saurabhhhcodes]

What changed

• Added a new FAQ entry explaining how to get assigned to an issue in GSSoC.

Why

• New contributors often need a clear, friendly explanation of the assignment process.

Validation

• git diff --check
• node -e "JSON.parse(require('fs').readFileSync('faqs.json','utf8')); console.log('faqs.json ok')"

Closes #69

[vercel]

Someone is attempting to deploy a commit to the Piyush Patel's projects Team on Vercel.

A member of the Team first needs to authorize it.