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/number/number.html.twig

@@ -1,23 +0,0 @@
-{% extends "forms/fields/text/text.html.twig" %}
-
-{% block input_attributes %}
-    type="number"
-    {% if field.validate.min is defined %}min="{{ field.validate.min }}"{% endif %}
-    {% if field.validate.max is defined %}max="{{ field.validate.max }}"{% endif %}
-    {% if field.validate.step is defined %}step="{{ field.validate.step }}"{% endif %}
-    {# Skip text.html.twig's minlength/maxlength and go directly to field.html.twig #}
-    {% if field.size %}size="{{ field.size }}"{% endif %}
-    {% if field.classes is defined %}class="{{ field.classes }}" {% endif %}
-    {% if field.id is defined %}id="{{ field.id }}" {% endif %}
-    {% if field.style is defined %}style="{{ field.style }}" {% endif %}
-    {% if field.disabled or isDisabledToggleable %}disabled="disabled"{% endif %}
-    {% if field.placeholder %}placeholder="{{ field.placeholder|t }}"{% endif %}
-    {% if field.autofocus in ['on', 'true', 1] %}autofocus="autofocus"{% endif %}
-    {% if field.novalidate in ['on', 'true', 1] %}novalidate="novalidate"{% endif %}
-    {% if field.readonly in ['on', 'true', 1] %}readonly="readonly"{% endif %}
-    {% if field.autocomplete is defined %}autocomplete="{{ field.autocomplete }}"{% endif %}
-    {% if field.validate.required in ['on', 'true', 1] %}required="required"{% endif %}
-    {% if field.validate.pattern %}pattern="{{ field.validate.pattern }}"{% endif %}
-    {% if field.validate.message %}title="{{ field.validate.message|t }}"
-    {% elseif field.title is defined %}title="{{ field.title|t }}" {% endif %}
-{% endblock %}