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/css/form.css

@@ -1,3 +1,33 @@
+fieldset {
+  margin: 0.5em 0 1em;
+  padding: 0;
+}
+
+fieldset legend {
+  font-weight: var(--font-weight-medium);
+  margin-bottom: 0.75em;
+}
+
+fieldset label {
+  display: block;
+}
+
+form fieldset label .help {
+  font-weight: var(--font-weight-normal);
+  display: block !important; /* overrides another rule in this file, remove when obsolete */
+}
+
+fieldset input[type="checkbox"],
+fieldset input[type="radio"] {
+  margin-right: 0.75em;
+  vertical-align: initial !important; /* overrides a semantic.css rule, remove when obsolete */
+}
+
+fieldset label:has(input[type="text"]),
+fieldset label:has(input[type="number"]) {
+  font-weight: var(--font-weight-medium);
+}
+
 .ui.input textarea,
 .ui.form textarea,
 .ui.form input:not([type]),
@@ -98,8 +128,7 @@ textarea:focus,
   color: var(--color-text);
 }
 
-.ui.form .required.fields:not(.grouped) > .field > label::after,
-.ui.form .required.fields.grouped > label::after,
+.ui.form .required.fields > .field > label::after,
 .ui.form .required.field > label::after,
 .ui.form label.required::after {
   color: var(--color-red);

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');