feat: use server-actions for authoring flow

This change actually makes the authoring flow work for
the most part by tying in emailing and more.

We have also done a number of quality of life updates to
simplify the codebase overall making it easier to continue
work on the refresh.

apps/web/src/helpers/getBoundingClientRect.ts

@@ -0,0 +1,10 @@
+export const getBoundingClientRect = (element: HTMLElement) => {
+  const rect = element.getBoundingClientRect();
+
+  const { width, height } = rect;
+
+  const top = rect.top + window.scrollY;
+  const left = rect.left + window.scrollX;
+
+  return { top, left, width, height };
+};