Start to work on structure of input/output

core-lib/src/lib.rs

@@ -1,3 +1,26 @@
+
+pub struct Board {
+    width: usize,
+    height: usize,
+}
+
+pub struct CutInput<'a> {
+   stock: &'a [Board],  
+   desired: &'a [Board],  
+}
+
+pub struct CutOutput {
+    
+}
+
+pub enum CutError {
+}
+
+pub fn cut(input:CutInput) -> Result<CutOutput, CutError> {
+    return Ok(CutOutput {})
+}
+
+
 pub fn add(left: u64, right: u64) -> u64 {
     left + right
 }