move user edit routes into their own module and blueprint

atst/routes/users.py

@@ -0,0 +1,17 @@
+from flask import Blueprint, render_template, g, redirect, session, url_for, request
+from atst.forms.edit_user import EditUserForm
+
+
+bp = Blueprint("users", __name__)
+
+
+@bp.route("/user")
+def user():
+    user = g.current_user
+    form = EditUserForm(data=user.to_dictionary())
+    return render_template("user/edit.html", form=form, user=user)
+
+
+@bp.route("/user", methods=["POST"])
+def update_user():
+    return redirect(url_for(".home"))