Move plugins to manifest, pin Docker version, add Makefile

- Add plugins.txt listing all plugins for reproducible installs
- Add Makefile with setup/start/stop/install-plugins targets
- Remove user/plugins/ from git tracking
- Pin Docker image to 1.7.49.5-ls244

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

plugins/admin/themes/grav/templates/partials/media-list-wrapper.html.twig

@@ -1,32 +0,0 @@
-<div class="grid media-container {% if is_modal %}in-modal{% endif %}">
-    {% set default_site_lang = grav.config.system.languages|first|first %}
-
-    {% if not route %}
-        {% include 'partials/media-list-wrapper__sidebar.html.twig' %}
-    {% endif %}
-
-    {% if is_modal %}
-        <div class="thumbs-list-container block size-3-4">
-            {% include 'partials/media-list-wrapper__list__filters.html.twig' %}
-            <h5 class="media-list-title"><span class="page-indicator">All Pages</span> <a class="hidden js__reset-pages-filter" href="#"><i class="fa fa-fw fa-times"></i></a></h5>
-
-            <div class="mediapicker-scroll">
-                {% include 'partials/media-list-wrapper__list.html.twig' with { is_modal: is_modal } %}
-            </div>
-
-            <input name="thumb-size" class="media-range" type="range" min="50" max="250" value="100" />
-        </div>
-    {% else %}
-        <div class="thumbs-list-container block {% if not route %}size-2-3{% endif %} ">
-            {% if not route %}
-                {% include 'partials/media-list-wrapper__list__filters.html.twig' %}
-                <h5 class="media-list-title"><span class="page-indicator">All Pages</span> <a class="hidden js__reset-pages-filter" href="#"><i class="fa fa-fw fa-times"></i></a></h5>
-
-                {% include 'partials/media-list-wrapper__list.html.twig' with { is_modal: is_modal } %}
-
-            {% else %}
-                {% include 'partials/media-list-wrapper__details.html.twig' %}
-            {% endif %}
-        </div>
-    {% endif %}
-</div>