Rewrote ennaf/unnaf Tool in Rust to test nafcodec library functionality

[j-schlesinger]

Description of Changes

A ennaf/unnaf tool in Rust to compare nafcodec directly to existing C implementation.

Summary of Changes

Changes to Nafcodec

The following changes were made to the Nafcodec library

• Changed Seq storage type from str to [u8] (more accurately represents data)
• added Size struct (for block sizes)
• added ability to extract block sizes and title from NAF file
• added ability to write mask and title to NAF file

CLI tool

The tool is quick and dirty, but it gets the job done.

• module implementing nafcodec encoding
• module implementing nafcodec decoding
• main function that handles CLI arguments and I/O

Testing

Compressed the same protein sequence with ennaf and naf_rs ennaf. Then compared that results were identical. Decompressed a file compressed by ennaf using naf_rs unnaf and compared it to the output of unnaf. The results were identical.