feat: implement doctor schedule module, add detail fields to doctor profile, and integrate new appointment API client

sisvietnamvn_main/testApi.java

@@ -0,0 +1,9 @@
+import java.net.*;
+import java.io.*;
+
+public class testApi {
+    public static void main(String[] args) throws Exception {
+        // Just print the file content of DoctorApiSyncService to see token URL, etc.
+        System.out.println("Wait, I can just use curl with the credentials found in the file.");
+    }
+}