Add spasm as an assembler

[rxt01]

I want to write assembly code for my ti84 with code completion and highlighting and the only assembler that's good enough for my needs is spasm.
hence it would be nice if spasm was added to the list of usable assembler.

[WillLillis]

Any links and/or resources you could provide that I could source assembler-specific information from would be greatly appreciated!

[ti-kid]

here is a link to the spasm github: https://github.com/alberthdev/spasm-ng/releases .