Streamline the types used throughout all file format reference pages

[rdw-software]

This: https://github.com/RagnarokResearchLab/ragnarokresearchlab.github.io/blob/main/docs/file-formats/01-index.md

It's probably clearer to use the standard C types, like uint8_t or uint32_t - possibly annotated with a "friendlier" name.

Edit: Can probably also use u32 and similar types. Potentially with a switch to change from Rust to C/C++ style types?