Feat: support new fields for meeting mode, proposed start date and duration.

As per title

app/views/staff.py

@@ -85,6 +85,13 @@ def create_project():
             proposer=current_user.username,
             on_behalf=form.on_behalf.data if form.is_student_proposal.data else None,
             category=form.category.data,
+            is_remote=(
+                form.meeting_mode.data == "remote"
+                if form.meeting_mode.data is not None
+                else None
+            ),
+            proposed_start_date=form.proposed_start_date.data,
+            duration_in_weeks=form.duration_in_weeks.data,
         )
         db.session.add(project)
         db.session.commit()
@@ -159,6 +166,7 @@ def edit_project(project_id):
                 shortlist_proposer(project)
             return redirect(url_for("staff.projects"))
         form = ProjectForm(obj=project)
+        form.meeting_mode.data = "remote" if project.is_remote is True else ""
         form.category.choices = [(c.code, c.name) for c in categories]
 
         if project.on_behalf is not None: