Fix invoke

[yaito3014]

fixes #32, fixes #33

[gemini-code-assist]

Code Review

This pull request refactors the invoke polyfill into a dedicated internal header and expands support for volatile-qualified, ref-qualified, and C-style variadic member functions. Feedback identifies an incorrect noexcept specifier for member object pointer dereferencing and suggests using macros to reduce repetitive trait specializations.

[cppwarningnotifier]

Environment				C++11	C++14	C++17	C++20	C++23	C++26
ubuntu	Clang	21	Debug	✅success	✅success	✅success	✅success	✅success	✅success
			Release	✅success	✅success	✅success	✅success	✅success	✅success
	GCC	14	Debug	✅success	✅success	✅success	✅success	✅success	✅success
			Release	✅success	✅success	✅success	✅success	✅success	✅success
windows	MSVC	2022	Debug		✅success	✅success	✅success	✅success	✅success
			Release		✅success	✅success	✅success	✅success	✅success
		2026	Debug		✅success	✅success	✅success	✅success	✅success
			Release		✅success	✅success	✅success	✅success	✅success

[yaito3014]

/gemini review

[gemini-code-assist]

Code Review

This pull request refactors the invoke polyfill by moving its implementation to a dedicated internal header and significantly expanding its capabilities. The new implementation adds support for cv-qualified, ref-qualified, and C-style variadic member function pointers, as well as noexcept function types. Additionally, the configuration logic was updated to better handle MSVC language versioning and detect C++20 features. Review feedback suggests modernizing the template logic by using if constexpr or std::enable_if_t and replacing complex macros with more maintainable metaprogramming techniques.