rename Generator to Coroutine#11

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viruscamp wants to merge 3 commits intotinaun:masterfrom

viruscamp:coroutine

Commits on Aug 27, 2024

follow [rename Generator to Coroutine](https://github.com/rust-lang/rust/pull/116958) and fix #10
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Commits on Sep 6, 2024

add support for immovable coroutine (self-referenced)
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Commits on Sep 14, 2024

doc: compare to gen block in edition2024
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