[FEA] [Java] Enforce Java code style format

[narangvivek10]

To update the cuVS pre-commit configuration to enforce a Java code style format.

[narangvivek10]

Assigning this to myself.

[mythrocks]

I started down this initially, and wondered whether we should incorporate google-java-format.

We can start with something simple for now, and switch to google-java-format if we need to later on.

[narangvivek10]

Slight change in the initial plan that involved upating the pre-commit configuration. I found a better option with spotless maven plugging. More details in the linked PR. I will mark it for review soon. Thanks!