SOLR-18234: Reorganize org.apache.solr.cli into domain-based sub-packages

[jaykay12]

Description/Scope

Reorganize org.apache.solr.cli into domain-based sub-packages

Solution

For the main Jira: SOLR-18234, final objective is to move cli package out from core module, into a separate module of itself.
This PR scope is to just make the original/current package structure organised.

There is some tangling between packagemanager package inside core, which depends on the SolrCLI that exists in cli. This change & any other improvement that i find good to do in the cli package, with come in series of PR before we finally migrate cli module out.

Tests

Please describe the tests you've developed or run to confirm this patch implements the feature or solves the problem.

Checklist

Please review the following and check all that apply:

• I have reviewed the guidelines for How to Contribute and my code conforms to the standards described there to the best of my ability.
• I have created a Jira issue and added the issue ID to my pull request title.
• I have given Solr maintainers access to contribute to my PR branch. (optional but recommended, not available for branches on forks living under an organisation)
• I have developed this patch against the main branch.
• I have run ./gradlew check.
• I have added tests for my changes.
• I have added documentation for the Reference Guide
• I have added a changelog entry for my change

[dsmiley]

Can you please describe this change? The PR description is not indicative; I suggest removing the template as it's a waste/distraction.

[jaykay12]

Grok Review of the PR:

Main	Feature

[jaykay12]

Unused method. thus removed it.

[jaykay12]

Can you please describe this change? The PR description is not indicative; I suggest removing the template as it's a waste/distraction.

yes, @dsmiley
PR was not ready by then, thus I kept it under draft.

Have added the description & PR scope now. Thanks in advance. ✨

[jaykay12]

@epugh can please check this PR? if this looks worthy enough, I will raise the one against picoCLI feature branch & get that one merged.

We can close this one, & let these re-packaging changes flow via the picoCLI migration.

[jaykay12]

@epugh can you check the objective of this PR & see if this improves our code structure & management?

[epugh]

I think I like it... The bigger challenge is that we have a LOT of seperate efforts all going in the CLI right now, and I'm not sure how to land this without breaking all the other work going on.. We need to get our CLI finished migrating over to Picocli and that is probably the bigger more important effort, then this could go on top...

[dsmiley]

@jaykay12 I think progress can be made now by an independent PR solely focused on untangling the outgoing solr-core to CLI dependencies. No grand reorganization. Would you agree @epugh ?

[dsmiley]

I'm referring to the subset of work quoted in the PR description:

There is some tangling between packagemanager package inside core, which depends on the SolrCLI that exists in cli. This change & any other improvement that i find good to do in the cli package, with come in series of PR before we finally migrate cli module out.

[jaykay12]

@jaykay12 I think progress can be made now by an independent PR solely focused on untangling the outgoing solr-core to CLI dependencies. No grand reorganization. Would you agree @epugh ?

@dsmiley I have raised the PR: #5018 for this one. Please review.