Add shaded bStats metrics + minor build fixes

[johncsuti]

Summary

This PR adds bStats metrics to InstantDeath and shades (relocates) the bStats classes to avoid classpath conflicts with other plugins.

Why

• Helps track plugin adoption and Minecraft/server version usage to guide future maintenance.
• Shading prevents collisions when multiple plugins bundle bStats.

What changed

• Added bStats dependency + initialization in plugin startup.
• Added Maven shading/relocation for org.bstats.
• Minor compile fixes from the initial integration (imports/syntax/typo).

Notes for maintainer

• bStats requires a plugin ID. If you prefer, I can change the ID with the ID from your own bStats dashboard.

[emipazd]

Will merge when Im on my pc

[johncsuti]

Merge when you can then update line 23 in instantdeath.java with your own plugin ID

[emipazd]

ID 28460