Rename Main to BookkeeperStarter for Improved Clarity and Context

[shoothzj]

Fix #2950

Motivation

The current class name org.apache.bookkeeper.server.Main is generic, which makes it less informative about the class's purpose in the context of BookKeeper. This can lead to confusion, especially for new contributors or during debugging sessions. By renaming this class to BookkeeperStarter, we aim to improve code clarity and express the class's role in starting the BookKeeper server more explicitly.

Changes

• Renamed Main class to BookkeeperStarter in all occurrences within the project.
• Updated references in scripts, test cases, and Java files to reflect the new class name.
• Minor cleanups in the BookkeeperStarter class

[nicoloboschi]

What about renaming AutoRecoveryMain to AutoRecoveryStarter in the same PR ?

[shoothzj]

@nicoloboschi I have been considering about this. I prefer open a new PR to do this refactor, since it's name has been related to AutoRecovery

[shoothzj]

@dlg99 @eolivelli @hangc0276 @merlimat @nicoloboschi @StevenLuMT @zhaijack PTAL

[eolivelli]

Honestly I don't see much value in this change: "Main" is alrady a good name for "the main class"
On the other hand I think that some custom scripts that launch the bookie may fail.

I am -0

[merlimat]

It might be good to leave Main for compatibility. eg: in Pulsar codebase we're using the name of the class directly

[shoothzj]

@eolivelli @merlimat Ok, I will close this PR and releated issue. :)