refactor: Remove std but add alloc

src/display/cli.rs

@@ -1,6 +1,8 @@
 use super::JawKind;
 use crate::display::ToothDisplay;
 use crate::{NotationKind, QuadrantKind, Tooth, ToothType};
+use alloc::format;
+use alloc::string::String;
 use owo_colors::{OwoColorize, Style};
 
 pub struct ToothCliFormatter;

src/display/mod.rs

@@ -1,6 +1,7 @@
 pub use crate::display::cli::*;
 use crate::NotationKind;
 use crate::Tooth;
+use alloc::string::String;
 mod cli;
 
 pub enum JawKind {

src/lib.rs

@@ -1,3 +1,9 @@
+#![no_std]
+extern crate alloc;
+use crate::alloc::borrow::ToOwned;
+use alloc::format;
+use alloc::string::{String, ToString};
+
 pub mod display;
 
 #[derive(Copy, Clone)]