Remove windows-sys dependency and use direct Win32 bindings

[caesay]

Summary

This PR eliminates the windows-sys dependency by introducing a custom winapi module that declares only the Win32 types, constants, and functions actually used by this crate. This reduces external dependencies while maintaining full functionality.

Key Changes

• New src/winapi.rs module: Contains direct Win32/NT bindings with #[repr(C)]-compatible definitions for:

  • Type aliases (HANDLE, HMODULE, BOOL, FARPROC)
  • Win32 constants (privilege flags, process access rights, file flags, etc.)
  • Structures (LUID, TOKEN_ELEVATION, TOKEN_PRIVILEGES, etc.)
  • Function imports from kernel32.dll and advapi32.dll

• Updated imports across codebase: Replaced all windows-sys imports with crate::winapi equivalents in:

  • src/lib.rs: is_process_elevated() and set_debug_privilege() functions
  • src/handles.rs: Process and file handle operations
  • src/ntapi.rs: NT API wrapper functions

• Removed windows-sys dependency: Deleted the entire [target.'cfg(windows)'.dependencies] section from Cargo.toml

Implementation Details

• The custom bindings use standard Rust FFI conventions (extern "system", #[link] attributes)
• K32-prefixed functions are properly aliased to their kernel32.dll implementations to avoid requiring psapi.lib
• All type definitions maintain C-compatible memory layout with #[repr(C)]
• Linting exceptions are configured for Win32 naming conventions (non_snake_case, non_camel_case_types, etc.)

https://claude.ai/code/session_01P8FHocv1oVuMhaZfsCgMpm