Implement a whole new move crate

moves/tests/pushes.rs

@@ -0,0 +1,15 @@
+// Eryn Wells <eryn@erynwells.me>
+
+use chessfriend_core::{piece, Square};
+use chessfriend_moves::{Builder, BuilderError};
+
+#[test]
+fn pawn_push() -> Result<(), BuilderError> {
+    let mv = Builder::push(&piece!(White Pawn on A3), Square::A4).build()?;
+
+    assert!(mv.is_quiet());
+    assert_eq!(mv.origin_square(), Square::A3);
+    assert_eq!(mv.target_square(), Square::A4);
+
+    Ok(())
+}