JetBrains: SearchBox: Hook up telemetryService to send events

Created by: vdavid

This is currently set to NOOP_TELEMETRY_SERVICE.

We need this to send telemetry data and monitor search box use. Not sure if we'll need to do this in Java or JS, but batching the requests will be important in either case. An argument for Java is that we should register install & uninstall events as well, in which cases the web view won't exist.

See VS Code's SearchResultsView.tsx for inspiration.