Item object sync

[ShackMcBlack]

PR Checklist

Please check if your PR fulfills the following requirements:

• All new classes have class-level documentation comments, if there are any at all
• Tests for the changes have been added (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Documentation update
• Other... Please describe:

What is the current behavior?

What is the new behavior?

Resolves #994
Resolves #997

Other information

Some ProtoMembers are ignored to prevent circular recursion, I tried to pick the ones that would be least impactful. See ItemCategorySurrogate.CanSubstitute and ItemObjectSurrogate.ItemComponent (ItemComponent.Item is of type ItemObject). Let me know if there is a better way around this.

Also one MapEvent test seems to fail but I could not immediately figure out why. I can look into it and see if there's something I did stupid.

[ShackMcBlack]

Need to add remainder of properties

[EgardA]

There are some problems with the items being classes, as they need to have their lifetime handled. I made some changes to the test so that it now correctly shows if it is working as intended 😄 Reach out if you need some help! 👍