bug(common): kmx struct alignment for more platforms 🙀

[srl295]

• in kmx_file.h, this attribute is currently only applied on WASM builds (clang-based), but we need to consider for other compilers as well (clang-other platforms, GCC, VC++)

#9134 (comment)

[srl295]

memdup'd in #9139

[mcdurdin]

Move

#ifdef __EMSCRIPTEN__
typedef KMX_DWORD __attribute__((aligned(1))) KMX_DWORD_unaligned;
typedef KMX_BOOL  __attribute__((aligned(1))) KMX_BOOL_unaligned;
typedef KMX_WORD  __attribute__((aligned(1))) KMX_WORD_unaligned;
#else
// TODO: consider other platforms
#define KMX_DWORD_unaligned KMX_DWORD
#define KMX_BOOL_unaligned  KMX_BOOL
#define KMX_WORD_unaligned  KMX_WORD
#endif

into km_types.h and then resolve the todo in it.

[mcdurdin]

See also keyman_core_api_bits.h for cross-platform patterns we should copy for consistency.

[srl295]

Fixed in #9977