Now that the GML formatter is both perserving comments and also mostly
agrees to the existing GML style, it can be used to auto-format all the
GML files in the system. This commit does not only contain the scripts
for running the formatting on CI and the pre-commit hook, but also
initially formats all the existing GML files so that the hook is
successfull.
This adds a TextBox along the bottom of the window. Double-clicking on a
character will append it to this box, which you can edit as any other
TextBox, or click the copy button to copy the output to the clipboard.
