fix(keys): fix delete schema response

- Add a new interface for response schemas after deletion, as the api
only returns the id of the api key instead of the whole object

Author: tharropoulos

src/main/java/org/typesense/api/Key.java

@@ -1,5 +1,6 @@
 package org.typesense.api;
 
+import org.typesense.interfaces.ApiKeyDeleteResponse;
 import org.typesense.model.ApiKey;
 
 public class Key {
@@ -16,8 +17,8 @@ public ApiKey retrieve() throws Exception {
         return this.apiCall.get(this.getEndpoint(), null, ApiKey.class);
     }
 
-    public ApiKey delete() throws Exception {
-        return this.apiCall.delete(this.getEndpoint(), null, ApiKey.class);
+    public ApiKeyDeleteResponse delete() throws Exception {
+        return this.apiCall.delete(this.getEndpoint(), null, ApiKeyDeleteResponse.class);
     }
 
     private String getEndpoint(){

src/main/java/org/typesense/interfaces/ApiKeyDeleteResponse.java

@@ -0,0 +1,57 @@
+package org.typesense.interfaces;
+
+import java.util.Objects;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+import io.swagger.v3.oas.annotations.media.Schema;
+
+public class ApiKeyDeleteResponse {
+    @JsonProperty("id")
+    private Long id = null;
+
+    public ApiKeyDeleteResponse id(Long id) {
+        this.id = id;
+        return this;
+    }
+
+    /**
+     * The unique identifier of the deleted key
+     * @return id
+    **/
+    @Schema(required = true, description = "The unique identifier of the deleted key")
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        ApiKeyDeleteResponse that = (ApiKeyDeleteResponse) o;
+        return Objects.equals(this.id, that.id);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(id);
+    }
+
+    @Override
+    public String toString() {
+        StringBuilder sb = new StringBuilder();
+        sb.append("class ApiKeyDeleteResponse {\n");
+        sb.append("    id: ").append(toIndentedString(id)).append("\n");
+        sb.append("}");
+        return sb.toString();
+    }
+
+    private String toIndentedString(Object o) {
+        if (o == null) return "null";
+        return o.toString().replace("\n", "\n    ");
+    }
+}