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

@@ -390,7 +390,7 @@
 					bind:value={bio}
 					rows="3"
 				></textarea>
-			</div>			
+			</div>
 			<div class="form-control">
 				<button class="button mt-4" onclick={onData}>{$t('button.submit')}</button>
 			</div>