Enable automatic versioning from Git tags

- Use hatch-vcs to automatically derive version from Git tags
- Remove hardcoded version number from pyproject.toml
- Version will now be automatically extracted from latest Git tag
- Eliminates need to manually update version in pyproject.toml

Author: sbryngelson

toolchain/pyproject.toml

@@ -1,10 +1,10 @@
 [build-system]
-requires = ["hatchling"]
+requires = ["hatchling", "hatch-vcs"]
 build-backend = "hatchling.build"
 
 [project]
 name = "mfc"
-version = "4.9.6"
+dynamic = ["version"]
 dependencies = [
     # General
     "rich",
@@ -56,3 +56,9 @@ dependencies = [
 
 [tool.hatch.metadata]
 allow-direct-references = true
+
+[tool.hatch.version]
+source = "vcs"
+
+[tool.hatch.build.hooks.vcs]
+version-file = "mfc/_version.py"