docs: improve display of built-in binary packages

[ndonkoHenri]

https://binaries-in-docs.flet-docs.pages.dev/reference/binary-packages-android-ios/

Summary by Sourcery

Improve documentation and automation around listing built-in binary packages, and adjust CI workflows to only run on manual dispatch.

Enhancements:

• Add a reusable MkDocs macro that fetches and renders the pypi.flet.dev package index from a PEP 503 simple repository, including platform annotations and multiple output formats.

Documentation:

• Rewrite the binary packages reference page to clarify concepts and dynamically render the list of supported wheels from the Flet PyPI index.

[cloudflare-workers-and-pages[bot]]

Deploying flet-docs with    Cloudflare Pages

Latest commit:	183ab7a
Status:	✅  Deploy successful!
Preview URL:	https://90953608.flet-docs.pages.dev
Branch Preview URL:	https://binaries-in-docs.flet-docs.pages.dev

View logs