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

tests/e2e/utils_e2e.js

@@ -58,6 +58,11 @@ export async function load_logged_in_context(browser, workerInfo, user) {
   return context;
 }
 
+export async function login({browser}, workerInfo) {
+  const context = await load_logged_in_context(browser, workerInfo, 'user2');
+  return await context.newPage();
+}
+
 export async function save_visual(page) {
   // Optionally include visual testing
   if (process.env.VISUAL_TEST) {