Initial implementation

.geomancy.yaml

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+checks:
+  desc: Check for the local development environment
+
+  Executables:
+    Python3:
+      desc: Python version >=3.11 needed (https://www.python.org)
+      checkExec: python3 >= 3.11
+    Task:
+      desc: Task runner and build tool (Taskfile.yaml)
+      checkExec: task >= 3
+    Sphinx:
+      desc: Documentation building tool (https://www.sphinx-doc.org/en/master/)
+      checkExec: sphinx-build >= 6.2
+    Towncrier:
+      desc: Changelog building tool (https://pypi.org/project/towncrier/)
+      checkExec: towncrier >= 23
+    Twine:
+      desc: Build and upload packages on PyPI (https://pypi.org/project/twine/)
+      checkExec: twine >= 4
+    Pytest:
+      desc: Test python packages (https://github.com/pytest-dev/pytest)
+      checkExec: pytest >= 7
+    Black:
+      desc: Python code formatter (https://github.com/psf/black)
+      checkExec: black >= 23
+
+  Paths:
+    GeomancyYaml:
+      desc: Check development requirements
+      checkPath: .geomancy.yaml
+      type: file
+
+  PythonPackages:  # This section is redundant with pyproject.toml
+    PyYaml:
+      desc: YAML parser for Python (https://pypi.org/project/PyYAML/)
+      checkPythonPkg: pyyaml >= 6.0
+    Click:
+      desc: Command-line interface tool (https://pypi.org/project/click/)
+      checkPythonPkg: click >= 8.1
+    ClickDefaultGroup:
+      desc: Allow default commands for click (https://pypi.org/project/click-default-group/)
+      checkPythonPkg: click-default-group
+    Rich:
+      desc: CLI terminal renderer (https://pypi.org/project/rich/)
+      checkPythonPkg: rich >= 13