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/form/templates/forms/fields/radio/radio.html.twig

@@ -1,21 +0,0 @@
-{% extends "forms/field.html.twig" %}
-
-{% block input %}
-    {% for key, text in field.options %}
-        {% set id = field.id|default(field.name) ~ '-' ~ key %}
-
-        <div class="radio {{ form_field_wrapper_classes }} {{ field.wrapper_classes }}">
-            <input type="radio"
-                   value="{{ key|e }}"
-                   id="{{ id|e }}"
-                   name="{{ (scope ~ field.name)|fieldName }}"
-                   class="{{ form_field_radio_classes }} {{ field.classes }}"
-                   {% if key == value %}checked="checked" {% endif %}
-                   {% if field.disabled or isDisabledToggleable %}disabled="disabled"{% endif %}
-                   {% if required %}required="required"{% endif %}
-                   {% if field.tabindex %}tabindex="{{ field.tabindex }}"{% endif %}
-            />
-            <label style="display: inline" class="inline" for="{{ id|e }}">{{ text|t|raw }}</label>
-        </div>
-    {% endfor %}
-{% endblock %}