[DOCS]: Add an Example of Validating SBOMs

[saquibsaifee]

Create documentation to guide users on validating SBOMs.

The CycloneDX Python library can validate an SBOM based on the schema, independent of the library's support for SBOM serialization, which is a valuable feature. However, the current documentation lacks clear examples and instructions on effectively utilizing this validation functionality.

The following points should be addressed in the documentation:

An overview of how to validate SBOMs based on schema specifications.
Examples demonstrating the validation process, including code snippets using JsonStrictValidator and other relevant classes.

[jkowalleck]

examples:

cyclonedx-python-lib/examples/complex_deserialize.py

Lines 148 to 156 in a210809

	my_json_validator = JsonStrictValidator(SchemaVersion.V1_6)
	try:
	validation_errors = my_json_validator.validate_str(json_data)
	if validation_errors:
	print('JSON invalid', 'ValidationError:', repr(validation_errors), sep='\n', file=sys.stderr)
	sys.exit(2)
	print('JSON valid')
	except MissingOptionalDependencyException as error:
	print('JSON-validation was skipped due to', error)

[saquibsaifee]

I will be working on this.