Add telemetry helper

[MikeStall]

For Check, Eval add a helper that accepts ILogger and captures (As appropriate):

• exceptions thrown - ToString(), type, callstack
• Expression Length
• Anonymized Expression (see https://github.com/microsoft/Power-Fx/blob/9178b974eced29fd06030d0f3ec563fa0048cf74/src/libraries/Microsoft.PowerFx.Core/Public/CheckResult.cs#L519 ). Probably allow host to customize this.
• Duration MS of check
• Duration MS of Eval

Some optional additional information provided by host:

• anonymized user
• "document id"

Also could apply this to LSP. Notably, we want:

• duration
• message kind
• any exceptions thrown

See Fx test site for examples.

[MikeStall]

TBD whether we depend on ILogger directly, or introduce an interface. ILogger would add another dependency; so may be better to just define our own interface that is similar to ILogger.

[MikeStall]

Here's a proposal:

1. Create a new class, CheckDiagnostics, with properties corresponding to items above.
2. CheckResult then hold a single instance of this object. As Check does things (parse, eval, etc), if the object is available, fill out the properties on the object.
3. The host can then log that object.