new op awaiter construct api

[wokron]

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[Copilot]

Pull request overview

This PR refactors how io_uring operation awaiters are constructed by introducing new build_*_op_awaiter helpers and relocating the existing make_* factory helpers under condy::detail, updating library code and tests accordingly.

Changes:

• Add build_op_awaiter, build_multishot_op_awaiter, and build_zero_copy_op_awaiter templates to centralize awaiter construction.
• Move make_op_awaiter / make_multishot_* / make_zero_copy_* helpers into condy::detail and update call sites across the library.
• Update tests to use condy::detail::make_* factories.

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
include/condy/awaiter_operations.hpp	Introduces new build_* awaiter constructors and moves make_* helpers into condy::detail.
include/condy/async_operations.hpp	Updates async wrappers to call detail::make_* factories.
tests/test_task.cpp	Updates test awaiter creation to condy::detail::make_op_awaiter.
tests/test_runtime.cpp	Updates runtime tests to use condy::detail::make_op_awaiter.
tests/test_op_awaiter.cpp	Updates op_awaiter tests to use condy::detail::make_* factories.
tests/test_fd_table.cpp	Updates fixed-fd tests to use condy::detail::make_op_awaiter.
tests/test_buffer_table.cpp	Updates registered-buffer tests to use condy::detail::make_op_awaiter.
tests/test_awaiter_operations.cpp	Updates awaiter operations tests to use condy::detail::make_op_awaiter.

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