Add Coal Cents economy

CoalGov/src/main/java/com/librewiki/coalgov/model/Fine.java

@@ -0,0 +1,17 @@
+package com.librewiki.coalgov.model;
+
+import java.util.UUID;
+
+public record Fine(
+        long id,
+        UUID playerUuid,
+        UUID issuerUuid,
+        long amount,
+        String reason,
+        Long paidAt,
+        long createdAt
+) {
+    public boolean paid() {
+        return paidAt != null;
+    }
+}