Deduplication

SOTN has a huge number of duplicates. We want to get these factored out to make the codebase more usable.

Functions Without Data

This PR is a good example of the process when data is not involved https://github.com/Xeeynamo/sotn-decomp/pull/1200/files

1. Add CheckColliderOffsets to the symbols.txt for each stage you want to dedupe. The address will be different for each overlay.
2. Factor out the function into a header.
3. #include the header in each file.

Functions With Data

This is similar to the previous case but all data needs to be given names and added to symbols.txt as well. This PR is an example: https://github.com/Xeeynamo/sotn-decomp/pull/459/files

Note how some of the stages required PfnEntityUpdates to be renamed.