feat: wall resizing by editing dimension label

[SSakibHossain10]

Allows users to click on the wall dimension label and type a custom value
to resize the wall directly.

arcada-label-change-size.mp4

Closes #13

[SSakibHossain10]

Hi @mehanix I've implemented the feature to allow resizing walls by editing the dimension label (#13).

Feel free to take a look and let me know if you'd like any changes or adjustments.

Thanks!