Committer Notes

This PR adds the following new features:

A slight improvement to the release build allowing conditional deployment of web and maven artifacts with workflow_dispatch.
Added support for namespace qualified names, which are now used for functions, definitions, and definition references. Cleaned up namespace handling throughout. This is a foundation for supporting models that reference models in other namespaces for XML use cases.
Completed basic support for Metapath arrays
- Support for array construction.
- Implemented array postfix and unary lookups.
- Added support for the following Metapath functions:
- array:get
- array:put
- array:append
- array:subarray
- array:remove
- array:insert-before
- array:join
- array:head
- array:tail
- array:reverse
- array:flatten
Added the 'metaschema-cli metapath list-functions' command to list supported functions.
Fixed https://github.com/usnistgov/oscal-cli/issues/216 by ensuring that the document node returns the root node when getValue is called.

This PR also completes the following maintenance tasks:

Normalized line endings which were inconsistent around use of lf vs crlf. Added a .gitattributes to help with this in the future. This should result in a more consistent experience on non-Windows platforms.
Cleaned up ISequence implementations, moving getFirstItem to be a method member. Added a utility function to convert a sequence into an array member.
Added a better means to collect the metaschema-related CLI commands for reuse.
Fixed spotbugs issues
Cleaned up some Javadocs.

[ ] Have you followed the guidelines in our Contributing document?
[ ] Have you checked to ensure there aren't other open Pull Requests for the same update/change?
[ ] Have you squashed any non-relevant commits and commit messages? [instructions]
[ ] Do all automated CI/CD checks pass?

[ ] Have you added an explanation of what your changes do and why you'd like us to include them?
[ ] Have you written new tests for your core changes, as applicable?
[ ] Have you included examples of how to use your new feature(s)?
[ ] Have you updated all website](https://pages.nist.gov/metaschema) and readme documentation affected by the changes you made? Changes to the website can be made in the website/content directory of your branch.

usnistgov / metaschema-java