stub out some classes

lib/HiH/Board.pm

@@ -0,0 +1,3 @@
+class HiH::Board {
+    has @.fields;
+}

lib/HiH/Field.pm

@@ -0,0 +1,4 @@
+class HiH::Field {
+    has Bool $.is-tarpit;
+    has @.hedgehogs;
+}

lib/HiH/Move.pm

@@ -0,0 +1,14 @@
+enum HiH::Direction is export (Left => -1, Forward => 0, Right => 1);
+
+class HiH::Move {
+    has HiH::Direction $.direction = Forward;
+    has $.player;
+    has $.old-x;
+    has $.new-x;
+    method new-x() {
+        $.old-x + $.direction;
+    }
+    method new-y() {
+        $.old-x + $.direction == Forward ?? 1 !! 0;
+    }
+}