Flat Assembler support for vim

Has syntax, compiler, indent support.

Set Flat Assembler syntax by default for `*.asm` files

Add following to your .vimrc:

autocmd BufReadPre *.asm let g:asmsyntax = "fasm"

Improvements to the original works:

All files are useable on Linux
Update to modern CPUs (AVX-512 registers)

Based on:

syntax:

https://github.com/RIscRIpt/vim-fasm-syntax

compiler:

https://www.vim.org/scripts/script.php?script_id=1073

indent:

https://github.com/vim-scripts/fasm.vim