Registration flow

Now, the tutor can set a general "Bio' during the registration process (/tutor/register/). The 'Bio' component is located in step 3 (Informations) of the registration flow.

Update (22/02):

• Successfully merged registration flows for learners and tutors into a single flow

frontend/src/routes/tutor/register/+page.svelte

@@ -95,7 +95,8 @@
 			return;
 		}
 		const res = await patchUserAPI(fetch, user.id, {
-			calcom_link
+			calcom_link,
+			availabilities: availability
 		});
 
 		if (!res) return;