feat: Add update checker tooling

Add the initial dataset, version checker, tests, and project setup files so the update checker can be run and validated.

pyproject.toml

@@ -0,0 +1,17 @@
+[build-system]
+requires = ["setuptools>=68", "wheel"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "check-for-updates"
+version = "0.1.0"
+description = "Check running service versions against upstream releases"
+requires-python = ">=3.10"
+dependencies = [
+  "PyYAML>=6.0",
+]
+
+[project.optional-dependencies]
+dev = [
+  "pytest>=8.0",
+]