docs: Instructions to cross compile for windows

[drstrangelooker]

Description

Should include a concise description of the changes (bug or feature), it's
impact, along with a summary of the solution

PR Checklist

Thank you for opening a Pull Request! Before submitting your PR, there are a
few things you can do to make sure it goes smoothly:

• Make sure you reviewed
  CONTRIBUTING.md
• Make sure to open an issue as a
  bug/issue
  before writing your code! That way we can discuss the change, evaluate
  designs, and agree on the general idea
• Ensure the tests and linter pass
• Code coverage does not decrease (if any source code was changed)
• Appropriate docs were updated (if necessary)
• Make sure to add ! if this involve a breaking change

[gemini-code-assist]

Code Review

This pull request adds a new documentation file, COMPILE_WINDOWS.md, outlining the steps to cross-compile the toolbox for Windows using Zig. The review feedback identifies several typos and grammatical errors, and suggests updating the project directory name to genai-toolbox to ensure consistency with the repository's naming conventions.

[github-actions]

🧨 Preview deployments removed.

Cloudflare Pages environments for pr-2911 have been deleted.