Jello

- Remove requirement to assign the result to 'r'

- Github Actions CI unit tests
- Code cleanup
- Add more tests

- Add -l option for lines output (deprecated lines() function)
- Add -i option to import a custom configuration to initialize the environment
- Fixed handling of strings with newlines for lines output
- Add over 100 tests

- Enhanced exception handling

- Add -r option for raw output
- Fix null, and boolean values
- Add -n option to print selected null values

- Handle TypeError for bash array joins