chore: reactive welcome page and better search

[AdityaHegde]

1. Welcome page is not reactive, small page sizes will break the UI and show items out of view. Adding a small version with vertical items.
2. Improving the search in connector selector by adding keywords per connector.

Checklist:

• Covered by tests
• Ran it and it works as intended
• Reviewed the diff before requesting a review
• Checked for unhandled edge cases
• Linked the issues it closes
• Checked if the docs need to be updated. If so, create a separate Linear DOCS issue
• Intend to cherry-pick into the release branch
• I'm proud of this work!