feat: HandlerAdapter 리스트를 가지는 클래스 설계 및 구현

app/src/main/java/com/techcourse/HandlerAdapterRegistry.java

@@ -0,0 +1,26 @@
+package com.techcourse;
+
+import webmvc.org.springframework.web.servlet.mvc.HandlerAdapter;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+
+public class HandlerAdapterRegistry {
+
+    private final List<HandlerAdapter> handlerAdapters = new ArrayList<>();
+
+    public HandlerAdapterRegistry addHandlerAdapter(HandlerAdapter handlerAdapter) {
+        handlerAdapters.add(handlerAdapter);
+        return this;
+    }
+
+    public Optional<HandlerAdapter> getHandlerAdapter(Object handler) {
+        for (HandlerAdapter handlerAdapter : handlerAdapters) {
+            if (handlerAdapter.supports(handler)) {
+                return Optional.of(handlerAdapter);
+            }
+        }
+        return Optional.empty();
+    }
+}