feat: make config_section a global CLI option

Users can now specify --config-section once at the beginning of the command instead of repeating it for each subcommand. Also bumped version to v0.5.0 for this new feature.

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "myice"
-version = "v0.4.3"
+version = "v0.5.0"
 description = "myice parsing"
 authors = [
     { name = "Rene Luria", "email" = "<rene@luria.ch>"},