feat: Added StaffController for handling staff-rel

src/main/java/com/wsmsdemo/controller/StaffController.java

@@ -0,0 +1,47 @@
+package com.wsmsdemo.controller;
+
+import com.wsmsdemo.model.Staff;
+import com.wsmsdemo.service.StaffService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+
+@RestController
+@RequestMapping("/staff")
+public class StaffController {
+
+    @Autowired
+    private StaffService staffService;
+
+    @GetMapping
+    public ResponseEntity<List<Staff>> listStaff() {
+        List<Staff> staffList = staffService.findAll();
+        return ResponseEntity.ok(staffList);
+    }
+
+    @PostMapping
+    public ResponseEntity<Staff> createStaff(@RequestBody Staff staff) {
+        Staff createdStaff = staffService.create(staff);
+        return ResponseEntity.ok(createdStaff);
+    }
+
+    @PutMapping("/{id}")
+    public ResponseEntity<Staff> updateStaff(@PathVariable Long id, @RequestBody Staff staff) {
+        Staff updatedStaff = staffService.update(id, staff);
+        return ResponseEntity.ok(updatedStaff);
+    }
+
+    @DeleteMapping("/{id}")
+    public ResponseEntity<Void> deleteStaff(@PathVariable Long id) {
+        staffService.delete(id);
+        return ResponseEntity.ok().build();
+    }
+
+    @PatchMapping("/{id}")
+    public ResponseEntity<Staff> partialUpdateStaff(@PathVariable Long id, @RequestBody Staff staff) {
+        Staff updatedStaff = staffService.partialUpdate(id, staff);
+        return ResponseEntity.ok(updatedStaff);
+    }
+}