feat: replace exploded base_* with public_url

Fixes #1574

BREAKING CHANGE: The `general` section in the config schema has changed: the `general.base_*`, `general.protocol` and `general.force_ssl` configuration fields have been replaced with a single `general.public_url` field. Be sure to use a valid url with the new configuration field.

api-client/tests/version2_test.py

@@ -11,10 +11,8 @@ def config_filepath(tmp_path: Path):
     filepath.write_text(
         """
 [general]
+public_url = http://localhost/test
 api_key = TEST_KEY
-base_dir = /test
-base_port = 80
-base_url = localhost
 """
     )
     return filepath