Rename Flask template app to pbpl

Signed-off-by: Arija A. <ari@ari.lt>

src/pbpl/models/__init__.py

@@ -0,0 +1,9 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""Models"""
+
+from typing import Tuple
+
+from .text import TextModel
+
+__all__: Tuple[str, ...] = ("TextModel",)