Approvaltests

* [You can log parameter values on entrance and exit of a method](https://github.com/approvals/ApprovalTests.Python/blob/main/docs/how_to/log_method_parameter_values.md)

Breaking changes
use markers text has changed to reduce clutter, this will break previous tests.

Mechanisms for capturing differences that occur on CI and allowing those differences to coexist.

* .variable() indents lists correctly
* .variable(list, show_types=True) includes types in output
* .use_markers() handle exceptions being thrown in method
* run_all_combinations()
* verify_logging_for_all_combinations()

* SimpleLogger._logger renamed to private
* SimpleLogger.register_logger
* variable has optional parameter: show_types
Example:
python
SimpleLogger.variable("dalmatians", 101, show_types = True)

Produces:
txt
variable: dalmatians = 101 <int>

- Added convenience functions for warnings and variables
- Warnings print the stack trace
- Variables will handle lists and print out each element in the list

Added Simple Logger timestamps and toggles and other convenience methods