* Create pull_request_template.md
Add a pull request template for better PR submissions.
* Document toolchain installation steps for Windows
* Add Table of Contents to toolchain.md
* Add cursor rendering section to window manager documentation
* Add cursor scale system commands to syscalls.md
* Add settings documentation for BoredOS
* Document cross-compiler build instructions for Linux
* Create README.md for BoredOS architecture documentation
* Update Architecture Overview link in README
* Reorganize Color Settings section in settings.md