Refactored Bitmap handler to decrease HEAP usage

[JanPetterMG]

Migrates BitmapHandler away from std::vector by introducing std::array for owned bitmap storage and std::span for non-owning bitmap views. The goal is to reduce dynamic allocations and make bitmap handling more deterministic.

Key changes

• Replaced std::vector<uint16_t> bitmap storage with std::array<uint16_t, N> where sizes are known
• Updated BitmapHandler to accept std::span<const uint16_t> for caller-provided bitmaps
• Reduced copying by passing bitmap data as views instead of owning containers

Impact

• Less heap usage and fewer allocations/copies
• Clearer ownership model (array owns, span views)