ltk_file: clean up patterns

[moonshadow565]

https://github.com/LeagueToolkit/league-toolkit/blob/main/crates/ltk_file/src/pattern.rs#L3

1. We should not unwrap in patterns
2. r3d2ammd -> r3d2anmd
3. See if we can get rid of functions and simply use a offset ? Consider maybe using this instead: https://docs.rs/pelite/latest/pelite/pattern/index.html

[Crauzer]

https://github.com/LeagueToolkit/cslol-rs/blob/master/crates/cslol-lib/src/ext.rs

[Crauzer]

r3d2ammd -> r3d2anmd definitely needs to get fixed