[Feature] Add parcel container support

[neckkola]

This allows sending containers with items inside as a parcel. The client will not allow sending if there are no trade items within the container.

Type of change

• New feature (non-breaking change which adds functionality)

Testing

https://www.youtube.com/watch?v=i-dhVej2ySA

Clients tested:
RoF2

Checklist

• I have tested my changes
• I have performed a self-review of my code. Ensuring variables, functions and methods are named in a human-readable way, comments are added only where naming of variables, functions and methods can't give enough context.
• I own the changes of my code and take responsibility for the potential issues that occur
• If my changes make database schema changes, I have tested the changes on a local database (attach image). Updated version.h CURRENT_BINARY_DATABASE_VERSION to the new version. (Delete this if not applicable)

[Kinglykrab]

Merge conflicts.