README: add notepad++ syntax highlighting project
README: add notepad++ syntax highlighting project

closes #442

raulgrell/zig,andrewrk/zig,raulgrell/zig,Dimenus/zig,zig-lang/zig,Dimenus/zig,zig-lang/zig,Dimenus/zig,raulgrell/zig,raulgrell/zig,zig-lang/zig,raulgrell/zig,andrewrk/zig