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/shared/forms.js

@@ -0,0 +1,16 @@
+import {expect} from '@playwright/test';
+import AxeBuilder from '@axe-core/playwright';
+
+export async function validate_form({page}, scope) {
+  scope ??= 'form';
+  const accessibilityScanResults = await new AxeBuilder({page}).include(scope).analyze();
+  expect(accessibilityScanResults.violations).toEqual([]);
+
+  // assert CSS properties that needed to be overriden for forms (ensure they remain active)
+  const boxes = page.getByRole('checkbox').or(page.getByRole('radio'));
+  for (const b of await boxes.all()) {
+    await expect(b).toHaveCSS('margin-left', '0px');
+    await expect(b).toHaveCSS('margin-top', '0px');
+    await expect(b).toHaveCSS('vertical-align', 'baseline');
+  }
+}