externalize patching logic a bit

src/main/java/com/falsepattern/endlessids/patching/Patch.java

@@ -0,0 +1,23 @@
+package com.falsepattern.endlessids.patching;
+
+import lombok.RequiredArgsConstructor;
+
+@RequiredArgsConstructor
+public class Patch {
+    public final String modid;
+
+    @SuppressWarnings("RedundantThrows")
+    public boolean preInit() throws Exception {
+        return false;
+    }
+
+    @SuppressWarnings("RedundantThrows")
+    public boolean init() throws Exception {
+        return false;
+    }
+
+    @SuppressWarnings("RedundantThrows")
+    public boolean postInit() throws Exception {
+        return false;
+    }
+}