initial commit for GRAPE

hercules_cg/src/grape.txt

+// Will come back to this after finishing 511 tn.
+
+// We can template these structs w/ size (8x8) if we want. 
+
+
+#[derive(Clone, Debug)]
+pub struct Switchbox {
+    pub output_wires: (usize, usize),
+}
+
+pub struct FunctionalUnit {
+    pub op_type: FuOp,
+}
+
+pub struct SliceDesc {
+    pub functional_units: Vec<Vec<FunctionalUnit>>, // is 8 x 8
+    pub switchboxes: Vec<Vec<Switchbox>>, // 1st row of functional units doesn't have switchboxes, so this is 7 x 8 
+}
+
+pub struct ChipDesc {
+    pub slices: Vec<SliceDesc>
+}
+
+/* Map BinopType to FuOp */
+pub enum FuOp {
+    Add,
+    Mult,
+    PassA,
+    ...
+}
+