add(layout/tab): Tab layout implementation

src/app.zig

@@ -171,6 +171,7 @@ pub fn App(comptime E: type, comptime R: fn (comptime bool) type, comptime fulls
                     if (buf[0] == 0x1b and read_bytes > 1) {
                         switch (buf[1]) {
                             // TODO: parse corresponding codes
+                            // 0x5B => parseCsi(input, &self.buf), // CSI see https://github.com/rockorager/libvaxis/blob/main/src/Parser.zig
                             else => {},
                         }
                     } else {