Rename to cf-requirements and add pywrangler section.

[dom96]

Summary

Updated the Python docs to refer to cf-requirements.txt instead of requirements.txt and added a new section about pywrangler to point people to it instead of the old Built-in package pathway.

Documentation checklist

• The documentation style guide has been adhered to.
• If a larger change - such as adding a new page- an issue has been opened in relation to any incorrect or out of date information that this PR fixes.
• Files which have changed name or location have been allocated redirects.

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PR Change Summary

Renamed requirements file and introduced a new section on pywrangler for managing Python packages in Workers.

• Updated documentation to refer to cf-requirements.txt instead of requirements.txt
• Added a new section on pywrangler for package management
• Deprecated the use of explicitly defined built-in packages in favor of pywrangler

Modified Files

• src/content/docs/workers/languages/python/how-python-workers-work.mdx
• src/content/docs/workers/languages/python/packages/index.mdx

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[github-actions]

This pull request requires reviews from CODEOWNERS as it changes files that match the following patterns:

Pattern	Owners
/src/content/docs/workers/	@cloudflare/workers-docs, @GregBrimble, @irvinebroque, @mikenomitch, @korinne, @WalshyDev, @cloudflare/deploy-config, @cloudflare/pcx-technical-writing, @kodster28, @cloudflare/wrangler, @cloudflare/workers-runtime-1, @cloudflare/wrangler

[github-actions]

Preview URL: https://cc9c703a.preview.developers.cloudflare.com
Preview Branch URL: https://dominik-pywrangler-docs.preview.developers.cloudflare.com

Files with changes (up to 15)

Original Link	Updated Link
https://developers.cloudflare.com/workers/languages/python/packages/	https://dominik-pywrangler-docs.preview.developers.cloudflare.com/workers/languages/python/packages/
https://developers.cloudflare.com/workers/languages/python/how-python-workers-work/	https://dominik-pywrangler-docs.preview.developers.cloudflare.com/workers/languages/python/how-python-workers-work/

[mikenomitch]

Do we want the cf-requirements references without any other context for them? Prob not

[dom96]

I removed references to it, though this section is specifically about how built-in packages are handled. Should I just remove this section, for now at least?

[dom96]

I'll keep it in for now, we can remove it later in a separate PR if needed.