[AppDev] Project Map - Jaeger UI

[ThomasVitale]

Review and finalize "Jaeger UI" section of Project Map Document: https://github.com/cncf/tag-app-delivery/blob/wg-app-dev-map-review/app-development-map/v1alpha1/index.md#jaeger-ui

[cerebro1]

I can take this.

[yurishkuro]

What challenges make developers adopt/use this project?

When a microservices-based system handles multitude of requests, it is difficult to know how each individual distributed request execution is shaped, as the other traditional monitoring tools mostly provide single-node visibility into aggregate behavior.

[cerebro1]

@salaboy @ThomasVitale @danieloh30 I reached out to Jaeger maintainers on their Slack channel they responded promptly. Thanks, @yurishkuro and @jkowall for creating and reviewing the PR. We will have a look and get it merged ASAP.