feat: add envelopes (#2025)

This PR is handles the changes required to support envelopes. The new
envelope editor/signing page will be hidden during release.

The core changes here is to migrate the documents and templates model to
a centralized envelopes model.

Even though Documents and Templates are removed, from the user
perspective they will still exist as we remap envelopes to documents and
templates.

packages/lib/server-only/team/get-member-roles.ts

@@ -21,7 +21,14 @@ type GetMemberRolesOptions = {
  * Returns the highest Team role of a given member or user of a team
  */
 export const getMemberRoles = async ({ teamId, reference }: GetMemberRolesOptions) => {
-  const team = await prisma.team.findFirst({
+  // Enforce incase teamId undefined slips through due to invalid types.
+  if (teamId === undefined) {
+    throw new AppError(AppErrorCode.NOT_FOUND, {
+      message: 'Team not found',
+    });
+  }
+
+  const team = await prisma.team.findUnique({
     where: {
       id: teamId,
     },