aa-colour 

🎨 Add colours to your amino acids in the terminal.
Code inspired from the crates owo-colors and colored.
Usage
```rust
use aa_colour::{AaColourise, palettes::Clustal};
println!("{}", AaColour::colour::(&'A').unwrap());
println!("{}", AaColour::blank::(&'-').unwrap());
```
Features
- [X] colourise a single amino acid according to different palettes
- [X] Clustal
- [ ] Amino acid scales
- Hydrophobicity
- Disorder propensity
- etc.
- [X] allow for amino acids to not be coloured (for protein alignments)