std: add options to std.json.stringfy to control escaping
std: add options to std.json.stringfy to control escaping

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