build: subpackages implementation (#164)

* migrate to hatch

* reorder tests

* generic fixtures

* straight forward conftest

* fix docs generation

* fix tox environments

* reformat tomls

* cleanup pyproject

* some play with renaming

* move root conftest into pytest plugins

* fix setup script

* move fixtures to __init__.py

* remove duplicate fixtures

* disable pylint warning

* simplify configuration fixture

* remove empty conftest

* remove crap from local pyprojects

tests/testresources/core/logging.ini

@@ -1 +1 @@
-../../../package/share/ahriman/settings/ahriman.ini.d/logging.ini
+../../../ahriman-core/package/share/ahriman/settings/ahriman.ini.d/logging.ini