* Add LanguageFlavorNotification handling and refactor LanguageService
- Added new notification handler for language flavor changed
- Refactored the LanguageService so that it no longer relies on so many intertwined static calls, which meant it was impossible to test without modifying the static instance. This will help with test reliability in the future, and prep for replacing the instance with a service provider.
* Skip if not an MSSQL doc and add test
* Handle definition requests
* Fix diagnostics handling
* Port over initial block of create db implementation
* Test case placeholder
* In-progress work
* Stage changes to other machine
* Add database prototype strings
* Stage changes to other machine
* Stage changes
* Hook the database info into capabilities discovery
* Stage changes
* Update SMO to latest from ssms_main
* Various clean-ups
* Update localization files
