ReactiveX / RxPY / 29861267530

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master: 94%

Pull #804

github

feat(operators): add tap as an alias for do_action

`tap` existed as an alias for `do_action` from 2014 until the RxPY 3.0
rewrite. It was provided by the `@extensionmethod(Observable, alias=...)`
decorator, and disappeared in 5be144c1 (2017-12-16) when the extension
method machinery was replaced by pipeable operators. Nothing carried the
alias forward, so the removal was incidental rather than deliberate,
which is why it was never mentioned in the changelog.

Reintroduce it as a thin delegating function so Sphinx documents it as
its own entry with a cross-reference back to `do_action`.

Closes #750

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

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