feat(pickups): Added pickups and pickup spawning

[finger563]

Description

• Updated BPI_Interaction so that the interaction returns a bool
• Updated affected classes which implement interaction so that they return bools (grid, ufgchar_base, bigmoss)
• Added Pickup_BASE and AutoPickup_BASE for the types of actors which are the pickup variants
• Updated inventory to fix issue with number of items added being the total number of items of that type

Motivation and Context

Closes #6
Closes #4

How has this been tested?

Ran in editor and ensured that:

• NPC interaction still works with both NPCs
• BigMoss can still be placed and rotated, and its spawned item is generated but must be manually picked up
• Growable_BASE can still be placed, and its spawned item is automatically picked up when the player comes in range

Screenshots (if appropriate):

Little moss / automatic pickups:

auto-pickup-test-compressed.mp4

Big moss / rotation / manual pickups:

pickup-test-compressed.mp4

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• New Art / Asset
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update
• Art / Asset Update
• Software change

Checklist:

• My change requires a change to the documentation.
• I have added / updated the documentation related to this change via either README or WIKI

Software

• I have added tests to cover my changes.
• I have updated the .github/workflows/build.yml file to add my new test to the automated cloud build github action.
• All new and existing tests passed.
• My code follows the code style of this project.