Multi tools won't reset their modes after server restart

[WalshyDev]

Description

Multi tools reset their mode after server restart. I found it really annoying and so did my players, so I decided to fix that.
This pull request also adds a display of current multi tool mode in its lore.
Feel free to improve my code. I tried to achieve my goal without changing too much stuff, so it shouldn't break anything.

Proposed changes

• Multi tools keep their current mode after server restart
• Current multi tool mode is displayed in its lore (works with already existing multi tools)

Checklist

• I have fully tested the proposed changes and promise that they will not break everything into chaos.
• I have also tested the proposed changes in combination with various popular addons and can confirm my changes do not break them.
• I have made sure that the proposed changes do not break compatibility across the supported Minecraft versions (1.16.* - 1.20.*).
• I followed the existing code standards and didn't mess up the formatting.
• I did my best to add documentation to any public classes or methods I added.
• I have added Nonnull and Nullable annotations to my methods to indicate their behaviour for null values
• I added sufficient Unit Tests to cover my code.

[github-actions]

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Branch naming convention	Label
feature/**	🎈 Feature
fix/**	✨ Fix
chore/**	🧹 Chores
api/**	🔧 API
performance/**	💡 Performance Optimization
compatibility/**	🤝 Compatibility

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[sonarcloud]

Quality Gate passed

The SonarCloud Quality Gate passed, but some issues were introduced.

7 New issues
0 Security Hotspots
13.2% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[github-actions]

Slimefun preview build

A Slimefun preview build is available for testing!
Commit: e24a51a3

https://preview-builds.walshy.dev/download/Slimefun/4122/e24a51a3

Note: This is not a supported build and is only here for the purposes of testing.
Do not run this on a live server and do not report bugs anywhere but this PR!

[womzil]

Sorry if I missed something obvious, but what has to be done in order for this change to be merged with the master branch?