Major Performance Boost

[ssquadteam]

📋 Description

We were plagued with performance issues so we decided to Fork it and implement the below mentioned changes which helped BY A LOT

✅ Checklist

• [✅] My code follows the project's coding style and guidelines
• [✅] I have tested my changes locally and they work as expected
• [Not Applicable] I have added necessary documentation (if applicable)
• [Not Applicable] I have linked related issues using Fixes #issue_number or Closes #issue_number
• [✅] I have rebased/merged with the latest main branch

🔍 Changes

Please provide a brief summary of the changes made in this PR.

• Implemented caching for hologram text update using Guava Cache for improved performance
• Made it so it Caches entity data accessors to reduce reflection overhead

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🧪 How to Test

Please describe how to manually test the changes made in this PR.

1. Just Spin it up in a Server with large Player counts, w/ many Holograms with Placeholders and so on

Below are Spark References-

Before

After

First was taken with 400-500 on
The After was taken with 600+ on

[Grabsky]

Concept and general impl looks good. Code review from @OliverSchlueter is still pending but I'm excited to see these changes. Thank you!

Fixes #119

[OliverSchlueter]

LGTM, thank you! I'll merge it once the next version of FancyHolograms is released (right after 1.21.11 is out), so it's in dev builds a bit longer