chore: deprecation notice (#105)

Signed-off-by: Dorian Johnson <2020@dorianj.net>

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,11 +1,3 @@
-# Code Freeze: no PRs accepted temporarily
+# Deprecated: please visit https://github.com/amundsen-io/amundsen/tree/main/common
 
-## PLEASE DO NOT OPEN PULL REQUESTS AGAINST THIS REPO
-
-The Amundsen project is currently transitioning from many sub-repos into a single monorepo.
-
-We are not accepting Pull Requests until Monday, April 26 (at the latest, hopefully earlier). After that time, you'll need to open your PR against the mono-repo.
-
-To read more about this transition, refer to the RFC: https://github.com/amundsen-io/rfcs/blob/master/rfcs/031-monorepo.md
-
-If you have any questions, please find @dorianj on Slack.
+The Amundsen project [moved to a monorepo](https://github.com/amundsen-io/rfcs/pull/31). This repository will be kept up temporarily to allow users to transition gracefully, but new PRs won't be accepted.

README.md

@@ -1,3 +1,7 @@
+# Deprecated: please visit https://github.com/amundsen-io/amundsen/tree/main/common
+
+The Amundsen project [moved to a monorepo](https://github.com/amundsen-io/rfcs/pull/31). This repository will be kept up temporarily to allow users to transition gracefully, but new PRs won't be accepted.
+
 # Amundsen Common
 [![PyPI version](https://badge.fury.io/py/amundsen-common.svg)](https://badge.fury.io/py/amundsen-common)
 [![License](http://img.shields.io/:license-Apache%202-blue.svg)](LICENSE)