docs: add contributor and fix README typos

[bayodeolamikunle]

This PR makes small documentation improvements to PinPointPro.

Changes Made

• Added @bayodeolamikunle to CONTRIBUTORS.md.
• Fixed typographical and punctuation errors in README.md.
• Improved wording and consistency in the affected sections.

Testing

• Reviewed the changes using git diff.
• Confirmed that only CONTRIBUTORS.md and README.md were modified.
• No application code or functionality was changed.

Checklist

• Synced with upstream/main before branching
• Modified only 'CONTRIBUTORS.md and README.md' files
• Fixed documentation issues in README.md
• Added my name to CONTRIBUTORS.md
• Reviewed my changes before committing
• No application code was modified
• CONTRIBUTORS.md entry uses the required format
• Commit message uses Conventional Commits format