route, form, and domain methods for updating workspace name

atst/forms/workspace.py

@@ -0,0 +1,8 @@
+from wtforms.fields import StringField
+from wtforms.validators import Length
+
+from .forms import ValidatedForm
+
+
+class WorkspaceForm(ValidatedForm):
+    name = StringField("Workspace Name", validators=[Length(min=4, max=50)])