Support for an "executor" implementation

[hoangtungdinh]

Is your feature request related to a problem? Please describe.

Currently, the baselib only provides interfaces to interact with the Config file format and Result file format. Each Python Checker Bundle is responsible for:

1. Define arguments
2. Read the input Configuration file
3. Register individual checkers and rules
4. Support common concepts such as preconditions (skip a check if another check fails), and applicable versions.
5. Executing checkers
6. Copy parameters from the configuration to the result
7. Write result to file
8. Support generation of markdown documentation

Describe the solution you'd like

To help users get started quickly with implementing checker bundles, the baselib could provide an "executor" that takes care of all the above steps. The executor should allow users to define, register and execute all the checkers in their checker bundle in a simple way, following the inversion of control principle, such as:

def main():
    executor = qc_baselib.Executor(checker_bundle_name=..., description=...)
    executor.register_checker(checker=my_first_checker)
    executor.register_checker(checker=my_second_checker)
    executor.run()

The executor should be generic to support Checker Bundles for different standards.

A first implementation of a sequential executor concept (which needs revision) can be found in qc-opendrive, where inversion of control is implemented in a Pythonic way.

Additional context

Implementing the "executor" will help the QC Framework introduce advanced concepts such as applicable versions and preconditions.