Bitfont Repository: Implement Decoders and Compose Them

You are given an existing repository, Bitfont, with its files and tests already in place. Bitfont v1 (.bfnt) is a compact binary container for bitmap fonts: a 16-byte header, an offset table, and one record per glyph whose payload is a bit stream of pixel rows. The writer side of the repo works; the reader side is missing. Your job is to implement its two decoders and compose them: Decoder B (upper decoder) parses the raw input into the intermediate format: it validates the…