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/pages/api/stripe/webhook/index.ts

@@ -124,16 +124,16 @@ export default async function handler(req: NextApiRequest, res: NextApiResponse)
         document.document = await insertImageInPDF(
           document.document,
           signatureDataUrl,
-          field.positionX,
-          field.positionY,
+          field.positionX.toNumber(),
+          field.positionY.toNumber(),
           field.page,
         );
       } else {
         document.document = await insertTextInPDF(
           document.document,
           signatureText ?? '',
-          field.positionX,
-          field.positionY,
+          field.positionX.toNumber(),
+          field.positionY.toNumber(),
           field.page,
         );
       }