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/app/whitelabel/compile.js

@@ -1,25 +0,0 @@
-import { config } from 'grav-config';
-import request from '../utils/request';
-
-export default ({ preview = false, exportScss = false, color_scheme = {}, fonts = {}, callback = () => {} } = {}) => {
-    let task = exportScss ? 'exportScss' : 'compileScss';
-    // console.log(config);
-    const URI = `${config.base_url_relative}.json/task:${task}`;
-    request(URI, {
-        method: 'post',
-        body: Object.assign({}, preview ? { preview } : null, color_scheme)
-    }, callback);
-};
-
-export const prepareElement = (element) => {
-    element.data('busy_right_now', true);
-    if (!element.data('current_icon')) {
-        element.data('current_icon', element.find('.fa').attr('class'));
-    }
-    element.find('.fa').attr('class', 'fa fa-fw fa-spin fa-refresh');
-};
-
-export const resetElement = (element) => {
-    element.data('busy_right_now', false);
-    element.find('.fa').attr('class', element.data('current_icon'));
-};