[#1066] Add EventTypes enum to Events

[atanasbozhkov]

===:clipboard: PR Checklist :clipboard:===

• 📌 issue exists in github for these changes
• 🔬 existing tests still pass
• 📐 new tests written and passing / old tests updated with new scenario(s)
• 📄 changelog entry added (or not needed)

==================

Closes #1066

Changes:

• Added EvenTypes enum to Events.ts

First time PR Questions:

• Not sure how to test this - if there is a place where I can drop in the enum values to make sure it's encluded do let me know.

• Additionally - I noticed that there two events mapping to the same string value - EventType.Enter as well as EventType.EnterTrigger - what's the reason for this?

• Do I need to open an issue for this?

• Do I update the changelog?

Tested locally - with this simple scenario and seems good.

[eonarheim]

@atanasbozhkov to answer your questions:

• Please do create a changelog entry under the Added section

• I've already created an issue to document our conversation on the forum and update the PR accordingly Create strongly typed EventTypes #1066

• I don't think we need to add any tests for this particular enhancement, since we are doing string literal typing in the on/off/once methods I'm not too concerned.

• I think this is a bug, they should not be ambiguous! EventType.Enter's literal value appears to be used in Pointer.ts#createPointerEventByName and is meant to handle a specific pointer event, and EventType.EnterTrigger is meant to fire on actor entry into a trigger area! It's possible EventType.Enter needs to be renamed or moved to match it's usage in Pointer.ts

[eonarheim]

@atanasbozhkov Also thanks for contributing!

[eonarheim]

LGTM 🚢