WIP: bring participo back - consistent use of bootstrap - formatting -

phpstan level 0 error free - fixes for kyu subpage - move mams into
participo framework - remove legacy `lib/db.php` usage - add attributer
admin function - add newsposter - fixing apiKey creation

homepage/participo/mams.js

@@ -0,0 +1,28 @@
+// What to do when the document is loaded.
+// @there is code duplication between the different participo/*.json! The participoLib needs a js section!
+document.addEventListener("DOMContentLoaded", function () {
+  // init materialize elements
+  initSelects();
+  initSidenav();
+  initDatepicker();
+});
+
+function initSelects() {
+  var elems = document.querySelectorAll("select");
+  var instances = M.FormSelect.init(elems);
+}
+
+function initSidenav() {
+  options = {};
+  var sideNavElems = document.querySelectorAll(".sidenav");
+  var sideNavInstances = M.Sidenav.init(sideNavElems, options);
+}
+
+function initDatepicker() {
+  options = {
+    format: "yyyy-mm-dd",
+  };
+  var elems = document.querySelectorAll(".datepicker");
+  var instances = M.Datepicker.init(elems, options);
+  console.log("datepicker initialized");
+}