Please document the matching versions of agent, collector, and sdk

[serv-inc]

Is your feature request related to a problem? Please describe.
Since it is a bit tedious to dig through the source code to find the version of opentelemetry-proto, and to link that to the correct opentelemetry-collector, and the correct opentelemetry-javaagent , which both have different versions: is there a list detailing the relationships ?

Which versions of the agent need to be used with which versions of

1. collector, and
2. e.g. the java sdk

Describe the solution you'd like
A table which the matching versions, either specific versions or version ranges.

Describe alternatives you've considered
A BOM seems suboptimal, since the collector is e.g. deployed via rpm as a standalong tool, the java agent is a file on the host system, and the library is most often deployed via e.g. maven.

Additional context
Suggested in #6802 (comment)

[jack-berg]

For reference, the version of opentelemetry-proto we work off of is defined here: https://github.com/open-telemetry/opentelemetry-java/blob/main/dependencyManagement/build.gradle.kts#L75

Should find a way to allow this version to be highlighted in the README and possibly on the otel java docs intro page.