Vizex

- Moved `vizextree` as a separate CLI command instead of being part of the `vizex`
- Reorganized modules into well-defined packages (folders) to prevent import conflicts and improve program organization.
- Refactored `vizexdf` src code for better readability and maintainability

What's Changed
* Tree feature by bexxmodd in https://github.com/bexxmodd/vizex/pull/40


**Full Changelog**: https://github.com/bexxmodd/vizex/compare/v2.0.6...v2.1.0

- Made size prints SI-compatible (e.g. kB, MB, GB, etc.)
- Bug fixed when directory size was returning as 0 when some of the symlinks were broken
- Added --tree (-t for short) command to vizexdf which allows you to print directory tree for selected levels of child directories
- Updated tools, files, viztree tests
- Small refactoring and typo corrections

Release History
- v1.9.9:
- Added `vizexdf` which prints directory data in style
- Added alias `-l` option to save edited line as alias for a command
- New logo
- Refactoring and more explicit docstrings

- Added battery information display
- Now you can save the output in CSV or JSON formats
- Small bug corrections

- Major refactoring
- Now charts can print string data
- Options class is separated with all the correct getters and setters

- Refactored module disks.py
- Unit Tests created
- Handling of unavailable colors/attributes
- Pie-chart option doesn't throw the error anymore
- Set up the color of all the text
- Updated docstrings