Use hatch and versioningit for modern project management

This MR simplifies the project handling through the use of hatchling and versioningit for dynamic version numbers.

conda/meta.yaml

@@ -23,6 +23,8 @@ requirements:
   host:
     - python >=3.10
     - pip
+    - hatchling
+    - versioningit
     - click >=8
     - click {{ click }}
     - tomli {{ tomli }}