feat!: New handlers for custom item & remove old and useless things

[MS-crew]

Description

Describe the changes
Added New handlers for custom item & remove old and useless things

What is the current behavior? (You can also link to an open issue here)

What is the new behavior? (if this is a feature change)

Does this PR introduce a breaking change? (What changes might users need to make in their application due to this PR?)
For this maybe but it was already going to be removed and forgotten , oh and for config ofcourse idk i will mark this pr as Breaking Change

Other information:

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentations

Submission checklist

• I have checked the project can be compiled
• I have tested my changes and it worked as expected

Patches (if there are any changes related to Harmony patches)

• I have checked no IL patching errors in the console

Other

• Still requires more testing

[louis1706]

You did breaking change

[MS-crew]

You did breaking change

Yes Breaking Changes YOLOOOOOOOOO