add comments

src/lang.zig

@@ -65,6 +65,7 @@ pub const Lang = struct {
             stmt = std.mem.trimLeft(u8, stmt, "\n");
 
             if (stmt.len == 0) continue;
+            if (stmt[0] == '#') continue;
 
             // TODO better tokenizer instead of just tokenize(" ");
             var tok_it = std.mem.tokenize(stmt, " ");