Export Telemetry type

[remcohaszing]

What does this PR do?

Export the Telemetry type.

Alternatively it could be defined in yamlLanguageService.ts.

What issues does this PR fix or reference?

This is used by monaco-yaml.

Is it tested? How?

No.

[gorkem]

Can we alternately add telemetry.ts to index.ts ? This would also export TelemetryEvent which I feel maybe needed if a client really wants to send events.

[remcohaszing]

I think you meant to move it into yamlLanguageService, of which everything is also re-exported in index.ts. Otherwise language service code would have to import language server code.

[coveralls]

coverage: 84.071%. remained the same
when pulling 4212cc9 on remcohaszing:export-telemetry
into d354c58 on redhat-developer:main.

[coveralls]

coverage: 84.189%. remained the same
when pulling e147903 on remcohaszing:export-telemetry
into c1cab4d on redhat-developer:main.