feat(validation): add configurability and namespace extraction

[jamieshorten]

Closes #31 and #30

Adds an options parameter to the validation method to configure strict mode and enable or disable map type support.

Adds a method to extract all unique concerto namespaces from a provided JSON object.

Author Checklist

• Ensure you provide a DCO sign-off for your commits using the --signoff option of git commit.
• Vital features and changes captured in unit and/or integration tests
• Commits messages follow AP format
• Extend the documentation, if necessary
• Merging to master from fork:branchname