[ADD] web_editor_class_selector: new module to add custom CSS in HTML editor.

This module allows users to create custom CSS classes, which can then be selected and applied directly in the HTML editor.

setup/web_editor_class_selector/setup.py

@@ -0,0 +1,6 @@
+import setuptools
+
+setuptools.setup(
+    setup_requires=['setuptools-odoo'],
+    odoo_addon=True,
+)