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/generate_file.py

@@ -0,0 +1,37 @@
+import os
+import shutil
+from .gnome import gnome_version
+from .get_version_folder import get_version_folders
+
+def generate_file(folder, final_file):
+    """
+    Combines all files in a folder into a single file
+    :param folder: source folder
+    :param final_file: location where file will be created
+    """
+    opened_file = open(final_file, "w")
+    css_folder = f"{folder}/.css/"
+
+    for file in os.listdir(css_folder):
+        with open(os.path.join(css_folder, file)) as f:
+            opened_file.write(f.read() + '\n')
+
+    version = gnome_version()
+
+    if version:
+        base_path = f"{folder}/.versions/"
+        version_folders = get_version_folders(version, base_path)
+
+        for version_folder in version_folders:
+            version_path = os.path.join(base_path, version_folder)
+            css_path = os.path.join(version_path, '.css')
+
+            for css_file in os.listdir(css_path):
+                with open(os.path.join(css_path, css_file)) as f:
+                    opened_file.write(f.read() + '\n')
+
+            for file in os.listdir(version_path):
+                if file.endswith('.svg'):
+                    shutil.move(os.path.join(version_path, file), folder)
+
+    opened_file.close()