public static GTheme loadTheme(File file) throws IOException {
		ThemeReader reader = new ThemeReader(file);
		return reader.readTheme();
	}
Reads a theme from a file. The file can be either a theme file or a zip file containing
a theme file and optionally a set of icon files.
@param file the file to read.
@return the theme that was read from the file
@throws IOException if an error occurred trying to read a theme from the file.
Ghidra/Framework/Gui/src/main/java/generic/theme/GTheme.java