refactor: move event primitives into DOM

[jderochervlk]

Stack context

Part 2 of 16 in the first Option 5 stack: flat interface ownership and compatibility cleanup.

• Previous: refactor: separate EventType feature #298
• Next: refactor: expose browser window from DOM #299

Review this PR as the incremental diff against #298.

Summary

• move foundational event, event-target, abort, listener, and initialization types into DOM
• remove the obsolete BaseEvent and EventTypes wrapper modules retained by refactor: separate EventType feature #298
• update interface bindings to use the shared DOM event types directly
• remove duplicate global event-listener bindings from DomGlobal

Temporary state

• this PR removes the temporary event wrappers introduced at the bottom of the stack; it does not add a replacement compatibility module
• the broad source-folder layout and initial five-feature configuration remain temporary until the follow-up Option 5 folder/feature stack

Review focus

• whether the types moved into DOM are genuinely foundational
• whether all former wrapper consumers preserve their public signatures

Verification

• npm run build
• npm test
• npm run format:check

[jderochervlk]

This was just spreading an empty object and creating a circular dependency.

[jderochervlk]

Adding this here allows accessing the window using DOM.window instead of Window.current.