Add vim syntax highlighter

vim-highlighting/README.md

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+Copy these folders to your `~/.config/vim` or `~/.config/nvim` folder, then restart vim/nvim. This will automatically enable fox32 syntax highlighting for .asm files.

vim-highlighting/ftdetect/fox32.vim

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+au BufRead,BufNewFile *.asm set filetype=fox32

vim-highlighting/syntax/fox32.vim

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+" fox32 vim syntax highlighting
+
+if exists("b:current_syntax")
+  finish
+endif
+
+syn match foxIdentifier    /[_A-Za-z0-9]*/
+syn region foxString start=/"/ end=/"/ skip=/\\"/
+syn match foxCharacter     /'\(?\|\\?\)/
+syn match foxDecimalNumber /\$\?-\?\d\+/
+syn match foxBinaryNumber  /\$\?-\?0b[01]\+/
+syn match foxHexNumber     /\$\?-\?0x\x\+/
+
+syn match foxComment ";.*$"
+syn match foxInclude "#.*$"
+
+syn match foxRegisters /\vr(3[01]|[12]?\d|sp)/
+
+syn match foxLabel /[_A-Za-z0-9]*:/
+
+syn keyword foxInstructions nop halt brk reti ret ise icl
+syn keyword foxInstructions inc dec not jmp call loop rjmp rcall rloop push pop int
+syn keyword foxInstructions add sub mul div rem and or xor sla sra srl rol ror bse bcl bts cmp movz mov rta in out
+
+syn keyword foxConditions ifz ifnz ifc ifnc ifgteq ifgt iglteq iflt
+
+syn keyword foxData data
+
+let b:current_syntax = "fox32"
+hi def link foxIdentifier    Identifier
+hi def link foxString        String
+hi def link foxCharacter     Character
+hi def link foxDecimalNumber Number
+hi def link foxBinaryNumber  Number
+hi def link foxHexNumber     Number
+hi def link foxComment       Comment
+hi def link foxInclude       Include
+hi def link foxRegisters     Operator
+hi def link foxLabel         Function
+hi def link foxInstructions  Statement
+hi def link foxConditions    Conditional
+hi def link foxData          Keyword