Update node struct to know about noodle connected to it

include/nodes.h

@@ -9,6 +9,7 @@
 #define OP_INPUT_COUNT 2
 #define EMPTY_NODE 0
 #define NODE_START 1
+#define CONNECTION_START 1
 
 typedef i32 (*node_func)(i32 a, i32 b);
 typedef enum node_type node_type;
@@ -31,6 +32,7 @@ union node_data {
 struct noodle {
   line ln;
   u64 connected_node;
+  u64 connection_idx;
 };
 
 struct node {
@@ -39,7 +41,9 @@ struct node {
   node_type type;
   node_data data;
   u64 inputs;
+  u64 connected;
   noodle *noodles;
+  noodle **connected_noodles;
 };
 
 #endif // !NODES_H