Add BitCount section to collectibles documentation at /docs/developer-docs/real-examples/using-add-source-and-deltas-for-collectibles-and-similar-achievements.md
Should cover:
- BitCount usage with AddSource
- Memory efficiency comparison
- Example achievement implementation
- Common bitflag patterns
Add BitCount section to collectibles documentation at
/docs/developer-docs/real-examples/using-add-source-and-deltas-for-collectibles-and-similar-achievements.mdShould cover: