tests/e2e: add test for authentication flow in compatibility mode (#14392)

* tests/e2e: add test for authentication flow in compatibility mode

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* web: Add prefix class to CSS for easier debugging of constructed stylesheets.

- Use CSS variables for highlighter.

* web: Fix issue where MDX components apply styles out of order.

* web: Fix hover color.

* web: Fix CSS module types. Clean up globals.

* web: Fix issues surrounding availability of shadow root in compatibility mode.

* web: Fix typo.

* web: Partial fixes for storybook dark theme.

* web: Fix overflow.

* web: Fix issues surrounding competing interfaces attempting to apply styles.

* fix padding in ak-alert in. markdown

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* web: Minimize use of sub-module exports.

---------

Signed-off-by: Jens Langhammer <jens@goauthentik.io>
Co-authored-by: Teffen Ellis <teffen@sister.software>

web/types/lit.d.ts

@@ -0,0 +1,21 @@
+/**
+ * @file Lit-specific globals applied to the Window object.
+ */
+
+export {};
+
+declare global {
+    interface HTMLElement {
+        /**
+         * A property defined by Lit to track the element part.
+         */
+        _$litPart$?: unknown;
+    }
+
+    interface Window {
+        /**
+         * A possible nonce to use create a CSP-safe style element.
+         */
+        litNonce?: string;
+    }
+}