[Damilorlar]

Summary

• Add .github/pull_request_template.md with a concise supply-chain review checklist.

Changes

• Asks whether package scripts or dependencies changed.
• Calls out .vscode, workflow, config, lockfile, and binary/font changes.
• Requires confirmation that no automatic task or hidden executable payload was added.
• Keeps the template at 21 lines, under the 30-line limit.

Testing

• Verified the template is 21 lines and valid Markdown.
• No automation or application code changes required.

Closes #475