fix(core): improved event types

[coryrylan]

PR Checklist

Please check if your PR fulfills the following requirements:

• [x] Tests for the changes have been added (for bug fixes / features)
• [ ] Docs have been added / updated (for bug fixes / features)
• [ ] If applicable, have a visual design approval

PR Type

What kind of change does this PR introduce?

• [x] Bugfix
• [ ] Feature
• [ ] Code style update (formatting, local variables)
• [ ] Refactoring (no functional changes, no api changes)
• [ ] Build related changes
• [ ] CI related changes
• [ ] Documentation content changes
• [ ] clarity.design website / infrastructure changes
• [ ] Other... Please describe:

What is the current behavior?

Some metadata was missing when generating the cds-angular directives. This included certain event types due to not being listed as public or the event was not available as a TS doc annotation. This also fixes the boolean attribute support cds-angular for the directives when an empty attribute is set on an element.

closes https://github.com/vmware/clarity/issues/6639 closes https://github.com/vmware/clarity/issues/6642

What is the new behavior?

• add additional event/output types to custom element metadata
• boolean attribute support

Does this PR introduce a breaking change?

• [ ] Yes
• [x] No

Other information