Docs: add generated API reference for the Python binding and link it alongside the TypeScript docs site

[Haroldwonder]

Summary

.github/workflows/docs-sdk.yml already publishes TypeDoc-generated API docs for the TypeScript SDK to GitHub Pages, but bindings/python has no equivalent — no pdoc/Sphinx config and nothing published anywhere. A Python integrator has only the README and source to go on.

Acceptance Criteria

• Add a pdoc (or Sphinx) config for bindings/python/trustlink and a workflow step that builds it.
• Published alongside the existing TypeDoc site (e.g. as a /python/ subpath) so there's one discoverable docs entry point.
• Linked from bindings/python's README and the main README.md.

[nafiisatu]

@nafiisatu has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

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