GNOME dependable installation, structure and style improvements

Split utils in utils.py to a directory
Moved ./gnome-shell_css/ to ./gnome-shell/.css/

scripts/utils/label_files.py

@@ -0,0 +1,44 @@
+import os
+
+def label_files(directory, label, *args):
+    """
+    Add a label to all files in a directory
+    :param directory: folder where files are located
+    :param label: label to add
+    :param args: files to change links to labeled files
+    :return:
+    """
+
+    # Open all files
+    files = [open(file, 'r') for file in args]
+    read_files = []
+
+    filenames = []
+
+    for filename in os.listdir(directory):
+        # Skip if the file is already labeled
+        if label in filename:
+            continue
+
+        # Split the filename into name and extension
+        name, extension = os.path.splitext(filename)
+
+        # Form the new filename and rename the file
+        new_filename = f"{name}-{label}{extension}"
+        os.rename(os.path.join(directory, filename), os.path.join(directory, new_filename))
+
+        filenames.append((filename, new_filename))
+
+    # Replace the filename in all files
+    for i, file in enumerate(files):
+        read_file = file.read()
+        read_file.replace(filenames[i][0], filenames[i][1])
+        read_files.append(read_file)
+        file.close()
+
+    write_files = [open(file, 'w') for file in args]
+
+    # Write the changes to the files and close them
+    for i, file in enumerate(write_files):
+        file.write(read_files[i])
+        file.close()