Clean up README formatting and remove blank lines

Removed extra blank lines and adjusted formatting in the README.

Author: fsbraun

README.rst

@@ -1,5 +1,3 @@
-
-
 ****************
 django CMS Alias
 ****************
@@ -64,21 +62,21 @@ Configuration
 
 django CMS Alias provides several Django settings to control its behavior:
 
-`STATIC_ALIAS_EDITING_ENABLED`
+``STATIC_ALIAS_EDITING_ENABLED``
     Default: ``True``
 
     Controls whether static aliases can be edited directly on frontend editable objects
     (such as pages) that include the ``{% static_alias %}`` template tag. When set to ``False``,
     static aliases will only be visible in the structure board but not editable in context.
 
-`VERSIONING_ALIAS_MODELS_ENABLED`
+``VERSIONING_ALIAS_MODELS_ENABLED``
     Default: ``True`` (if djangocms-versioning is installed)
 
     Enables versioning support for alias models when djangocms-versioning is available. When enabled,
     aliases support draft/published workflows, version history, and proper content lifecycle management.
     Set to ``False`` to disable versioning for aliases even if djangocms-versioning is installed.
 
-`MODERATING_ALIAS_MODELS_ENABLED`
+``MODERATING_ALIAS_MODELS_ENABLED``
     Default: ``True`` (if djangocms-moderation is installed)
 
     Enables moderation workflows for alias models when djangocms-moderation is available. When enabled,
@@ -154,4 +152,4 @@ For the plugin to work out of the box ``{% block content %}`` is expected to exi
 
 .. |CmsVersion| image:: https://img.shields.io/pypi/frameworkversions/django-cms/djangocms-alias.svg?style=flat-square
     :target: https://pypi.python.org/pypi/djangocms-alias
-    :alt: django CMS versions
+    :alt: django CMS versions