* Allow globalState to be synchronized across multiple windows (fixes #55834)

* address some feedback

Introduces the concept of a re-trigger character to the signature help provider. This is a seperate set of characters that are registered with the provider. Typing a retrigger character fires a new signature help request if signature help is already showing.

#54972

We compile using the alwaysStrict flag so these directives are not needed

This part removes most `use strict` directives that are right after the file header

 Wait to signal to the extHostTerminalService that the terminal is opened until the terminal has a name. (#58983)

Also added a change listener for title. Fixes #53057

* Initial work on signature help context

Fixes #54972

Adds `SignatureHelpContext`. This tells providers why signature help was requested

TODO:

- [ ] Better understand semantics of retrigger. Should `retrigger` be an flag instead of a `triggerReason`?
- [ ]  Fix skipped test
- [ ] Add more tests for trigger reasons / trigger characters

* Fix unit test

* Make sure we retrigger sig help if it is already showing

* Add test for dismiss and re-invoke

* Extract some constants

* Extract createMockEditor