Fix workspaceLogo in invite-email (#5865)

## Fixes wrong image url in email 

![image](https://github.com/twentyhq/twenty/assets/29927851/5fb1524b-874d-4723-8450-0284382bbeb3)

## Done
- duplicates and adapt `getImageAbsoluteURIOrBase64` from `twenty-front`
in `twenty-email`
- send `SERVER_URL` to email builder

packages/twenty-emails/src/utils/getImageAbsoluteURIOrBase64.ts

@@ -0,0 +1,16 @@
+export const getImageAbsoluteURIOrBase64 = (
+  imageUrl?: string | null,
+  serverUrl?: string,
+) => {
+  if (!imageUrl) {
+    return null;
+  }
+
+  if (imageUrl?.startsWith('data:') || imageUrl?.startsWith('https:')) {
+    return imageUrl;
+  }
+
+  return serverUrl?.endsWith('/')
+    ? `${serverUrl.substring(0, serverUrl.length - 1)}/files/${imageUrl}`
+    : `${serverUrl || ''}/files/${imageUrl}`;
+};