Migrate to python (#265)

* Add initial python migration

* Add pylint

* Add pre-commit

* Add Dockerfile

* Add expression matching

* Use shelve to store previous matches

* Add notifications

* Calculate post age

* Update README.md

rfd_notify/models/topic.py

@@ -0,0 +1,23 @@
+from .offer import Offer
+
+
+class Topic:
+    # pylint: disable=unused-argument
+    # pylint: disable=too-many-arguments
+    def __init__(
+        self,
+        topic_id: int,
+        title: str,
+        post_time: str,
+        web_path: str,
+        offer: dict,
+        **kwargs,
+    ):
+        self.topic_id = topic_id
+        self.title = title
+        self.post_time = post_time
+        self.web_path = web_path
+        self.offer = Offer(**offer)
+
+    def __repr__(self):
+        return f"Topic({self.title})"