Refactor CLI documentation

[albertteoh]

Requirement - what kind of business use case are you trying to solve?

Context: #539 (comment)

Problem - what in Jaeger blocks you from solving the requirement?

In https://www.jaegertracing.io/docs/latest/cli/, common CLI flags are duplicated for each "tool" (e.g. jaeger-query, jaeger-collector, etc.) and each component type such as storage (cassandra, elasticsearch, etc.), making the page very large and difficult to navigate.

Proposal - what do you suggest to solve the problem or improve the existing situation?

Refactor the page to group common flags under one section and each specific storage type to have their own specific flags.
Also consider having a page menu on the right, much like: https://www.jaegertracing.io/docs/latest/frontend-ui/.