CI: Add prospector config

Codacy requires us to have a config file to be able to adjust the checks that we want to ignore in the individual tools that prospector is running.

.prospector.yml

@@ -0,0 +1,23 @@
+# Config must be compatible with prospector 1.7.7 due to Python 3.6 support.
+# Pyright will run in a GitHub workflow as it was added in Prospector 1.10
+
+max-line-length: 120
+inherits:
+  - strictness_veryhigh
+
+dodgy:
+  run: true
+
+mccabe:
+  run: true
+
+pydocstyle:
+  run: true
+
+pyflakes:
+  run: true
+  disable:
+    - F841 # Covered by pylint
+
+vulture:
+  run: true

setup.cfg

@@ -37,6 +37,7 @@ lint_requires =
   black>=22.1.0
   pyright>=0.0.13
   isort>=5.8.0
+  prospector>=1.7.7
 doc =
   Sphinx>=5.3.0
   sphinx-rtd-theme>=1.2.0