Create PR review guidelines document

[replakcan]

Description

Create a document that defines how pull requests should be reviewed for this project.

Scope

• Define review priorities
• Define static export review rules
• Define AWS/deployment review rules
• Define what should be flagged during review
• Define expectations for AI-assisted review

Out of Scope

• Setting up the AI review tool itself
• Creating GitHub Actions
• Creating branch protection rules

Acceptance Criteria

• docs/pr-review-guidelines.md exists
• Review priorities are listed
• Static export compatibility rules are included
• AWS deployment rules are included
• Security concerns are included
• AI review expectations are documented

Technical Notes

• This file should be useful for GitHub Copilot/Codex-style review.
• Keep the rules direct and easy to follow.

Related

• Related to: Create GitHub Copilot instructions