Add staff application feature with API integration and frontend form implementation

backend/build.gradle.kts

@@ -40,6 +40,10 @@ dependencies {
     implementation("org.springframework.boot:spring-boot-starter-mail:3.1.5")
     implementation("org.springframework.boot:spring-boot-starter-thymeleaf")
 
+    //Open API
+    implementation("io.swagger.core.v3:swagger-annotations:2.2.37")
+    implementation("io.swagger.core.v3:swagger-models:2.2.37")
+
     //AOP
     implementation("org.aspectj:aspectjrt:1.9.19")
     implementation("org.aspectj:aspectjweaver:1.9.19")