Merge pull request #332 from Exonorid/zig

Added support for Zig

zig.nanorc

@@ -0,0 +1,9 @@
+syntax "Zig" "\.zig$$"
+color latte       "\<(align|allowzero|and|anyframe|anytype|asm|async|await|break|catch|comptime|const|continue|defer|else|enum|errdefer|error|export|extern|fn|for|if|inline|noalias|nosuspend|or|orelse|packed|pub|resume|return|linksection|struct|suspend|switch|test|threadlocal|try|union|unreachable|usingnamespace|var|volatile|while)\>"
+color brightcyan  "@[a-zA-Z]+[0-9]{0,2}"
+color cyan        "(true|false|null|undefined)"
+color cyan        "\<(0[xob])?([0-9]_?)+\>"
+color blue        "\<([iu][0-9]{1,5}|f16|f32|f64|f128)\>"
+color magenta     "\"[^"]*\""
+comment "//"
+tabgives "    "