docs(lab1): submit lab 1

[Valdezzar]

Goal

Submit Lab 1. The PR shows SSH commit signing, a local QuickNotes run, the PR template setup, and GitHub community actions.

Changes

• Added submissions/lab1.md
• Added local tool versions
• Added SSH authentication output
• Added QuickNotes /health, /notes, and POST /notes output
• Added signed commit verification output
• Added screenshots for request output and the Verified commit badge
• Added the GitHub Community section

Testing

QuickNotes was started locally with go run ..

I checked:

• GET /health
• GET /notes
• POST /notes
• GET /notes after the POST

The POST request created note id: 5, and the final notes response showed Count: 5.

I also checked the latest commit with git log --show-signature -1.

Checklist

• Title is a clear sentence (≤ 70 chars)
• Commits are signed (git log --show-signature)
• submissions/labN.md updated