Report-tool

- Bugfix: On Pypi, the README.md was not displayed correctly (images).
- Improvement: Better information in the pyproject.toml file.

- Feature: About Dialog has been reworked.

- Changed from Python 2.7 to Python 3.11
- Changed from PyQt4 to PyQt5
- Uses `poetry` for dependency management
- Code conventions:
- Cleaner code formatting (Black)
- Cleaner imports
- Type hints (in progress)
- Code structure
- Move all source files to ./report_tool
- Move docs images to ./docs.
- Centralize icons handling.
- Centralize path handling.
- Performances: Precompiled regex
- Bugfix: float are handled correclty now
- Bugfix: plotting was done twice
- Bugfix: json does not need `encoding` param in Python 3.
- Bugfix: logging, custom handler was heavy and broken.
- Bugfix: namespacing issues
- Bugfix: unicode issues

- Increase performance (decrease between v1.5 and 2.0 was due to an error in signal management),
- Add possibilty to take screenshot using a configurable shortcut.

- Management of transaction type using config file,
- Correct bug with proxy connection,
- Correct bug with log files.

- Possibility to export data to .txt file,
- Save state of GUI,
- Encode password and api key,
- Re-write debug features,
- Improve keywords management,
- Pep-8 formatting.