feat(tmpl): Introduce semantic HTML in forms

Modifies forms:

- (new) org team
- (new) repo webhook
- (new) repo protected branch

The forms are not completely rewritten to semantic HTML yet. The focus
of this change was on standard elements, some custom solutions were left
untouched for now.

- swaps the order fo permission radio buttons as per https://codeberg.org/forgejo/forgejo/issues/4983
- uses fieldsets to group related inputs
  - ensures consistent styling across forms
  - can be improved later, e.g. using horizontal lines between sections
- fixes: previous font size of labels was smaller than the font size of the help text
- help text are now part of the label, clicking them now also activates the input
- drop unused CSS (no required checkboxes in grouped class remain)
- playwright testing:
  - move login boilerplate to utils
  - automated form accessibility checking
    - allow defining the scope, because legacy parts of the forms are not yet accessible
  - assert some CSS properties that should not be overriden
- the Makefile adjustment was necessary, because eslint scanned some internal files in the tests/e2e/reports directory

web_src/js/features/comp/WebHookEditor.js

@@ -6,7 +6,7 @@ export function initCompWebHookEditor() {
     return;
   }
 
-  for (const input of document.querySelectorAll('.events.checkbox input')) {
+  for (const input of document.querySelectorAll('label.events input')) {
     input.addEventListener('change', function () {
       if (this.checked) {
         showElem('.events.fields');
@@ -14,7 +14,7 @@ export function initCompWebHookEditor() {
     });
   }
 
-  for (const input of document.querySelectorAll('.non-events.checkbox input')) {
+  for (const input of document.querySelectorAll('label.non-events input')) {
     input.addEventListener('change', function () {
       if (this.checked) {
         hideElem('.events.fields');