feat: add distortion effect

[setoelkahfi]

This PR adds a simple distortion effect to the source.

Run examples:

// Basic
cargo run --example distortion

// With music files
cargo run --example distortion_wav
cargo run --example distortion_wav_alternate

[yara-blue]

nice example! its great to have more stuff showing how to use periodic_access!

[yara-blue]

actually the if/else if/else here can be replaced by f32::clamp right? Might be a little cleaner (and maybe that gets optimized in the future)

[yara-blue]

Lets change the if/else if/else to a f32::clamp and then we are good to merge!

[yara-blue]

Looks great! just one more thing and we can merge. This deserves a changelog entry! 🥳 🎈

[yara-blue]

thanks!

merged into 0.21 instead of master, fixed that with some manual gitting

[setoelkahfi]

Thanks!