FancyHolograms: Add an option to refresh holograms on player's locale change

[SoSeDiK]

📋 Description

Adds an option to refresh holograms a player when their locale changes.

I display some server-side content that depends on player's client locale. Currently, I have to use the refresh interval, but this has two downsides: not seamless due to delay, and redundant updates for static holograms.

✅ Checklist

• My code follows the project's coding style and guidelines
• I have tested my changes locally and they work as expected
• I have added necessary documentation (if 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.

• Added a new config option and an event listener.

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🧪 How to Test

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

1. Enable config option.
2. Have static hologram with some dynamic placeholder.
3. While observing a hologram, change locale on the client.
4. Observe hologram refresh.