Could we please get syntax highlighting for MASM64 files?

[IbrahimHindawi]

Maybe I should have a go at it? Hints?

[ratchetfreak]

you can look at how odin support was added: https://github.com/EpicGamesExt/raddebugger/commit/4bc82db69eed8b563ab4ea5f4a86e56bb783d128

In short add ".asm" to the extensions that are matched, add a TXT_LangKind for asm, add it to the switch. Then add a txt_token_array_from_string__asm which does the actual tokenizing.