[BUG] [TYPING] Live class __enter__ method return type improperly annotated as "Live" instead of typing.Self

[AetherBreaker]

• I've checked docs and closed issues for possible solutions.
• I can't find my issue in the FAQ.

Describe the bug

The Live class's __enter__ method has an improperly annotated return type.

The method returns "Live", which causes improper type information when using context managers on subclasses of Live

In the example below, the live object returned by the context manager would be typed as an instance of Live instead of CustomLive by most type checkers.

from rich.live import Live


class CustomLive(Live):
    pass


with CustomLive() as live:
    ...

Suggested Fix
Replace the return type of the __enter__ method with typing.Self

from typing import Self

class Live(JupyterMixin, RenderHook):
    def __enter__(self) -> Self:
        self.start(refresh=self._renderable is not None)
        return self```

[github-actions]

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