fix: PlayerReceivingLoadoutEventArgs from LabAPI

[TiBarification]

Description

Re-adds logic of invoking events for loadouts

What is the current behavior? (You can also link to an open issue here)
LabApi events of loadout broken

What is the new behavior? (if this is a feature change)
LabApi events of loadout triggered

Does this PR introduce a breaking change? (What changes might users need to make in their application due to this PR?)
no

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

[Copilot]

Pull request overview

Re-introduces LabApi loadout event invocation during role changes so external LabApi plugins can observe/cancel loadout application again.

Changes:

• Adds LabApi ReceivingLoadout event invocation (with allow/deny gate) before inventory modifications.
• Adds LabApi ReceivedLoadout event invocation after items are granted.

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[louis1706]

This will make it fully usable