Mostly finished implementation of the new deck? ALso added some tests

src/Nadeko.Econ/Deck/Regular/RegularValue.cs

@@ -0,0 +1,18 @@
+namespace Nadeko.Econ;
+
+public enum RegularValue
+{
+    A = 1,
+    Two = 2,
+    Three = 3,
+    Four = 4,
+    Five = 5,
+    Six = 6,
+    Seven = 7,
+    Eight = 8,
+    Nine = 9,
+    Ten = 10,
+    Jack = 12,
+    Queen = 13,
+    King = 14,
+}