Huge update

- Drop support for Python 3.7.
- Use offline geolocation database instead of ip-api.com.
- Add support for proxy authentication.
- Add pre-compiled binaries.
- Refactor the code by a lot.
- Simplify config.
- Add automatic text encoding detection.
- Use TOML instead of INI for configuration.
- Add support for using httpbin-compatible services and services which return plain IP address for getting proxy's exit node.
- Add support for reading proxy lists from local files.
- Add support for saving to json.
- Remove support for saving geolocation to txt, use json instead.
- Improve parser.
- Improve config validation.
- Use poetry instead of requirements.txt.
- Use venv in start scripts.

.github/workflows/update-dependencies.yml

@@ -12,6 +12,9 @@ jobs:
     strategy:
       matrix:
         include:
+          - cmd: pipx run poetry lock --no-interaction
+            commit-msg: Update poetry.lock
+            branch: update/poetry-lock
           - cmd: pipx run pre-commit autoupdate
             commit-msg: Update .pre-commit-config.yaml
             branch: update/pre-commit-config