Add cuda_buffer_backend and torch_buffer_backend for rosidl::Buffer#1

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yuanknv wants to merge 19 commits intoros2:mainfrom

yuanknv:native_buffer_backends

Commits on Apr 7, 2026

initial implementation of cuda_buffer_backend and torch_buffer_backend
yuanknv
committed

Commits on Apr 8, 2026

clean up
yuanknv
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bug fix
yuanknv
committed

Commits on Apr 11, 2026

fix lints
yuanknv
committed

Commits on Apr 16, 2026

Commits on Apr 21, 2026