feat(backend): implement equipments entities and modify db

backend/src/main/java/com/magistr/app/dto/ClassroomRequest.java

@@ -0,0 +1,42 @@
+package com.magistr.app.dto;
+
+import java.util.List;
+
+public class ClassroomRequest {
+    private String name;
+    private Integer capacity;
+    private Boolean isAvailable;
+    private List<Long> equipmentIds;
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public Integer getCapacity() {
+        return capacity;
+    }
+
+    public void setCapacity(Integer capacity) {
+        this.capacity = capacity;
+    }
+
+    public Boolean getIsAvailable() {
+        return isAvailable;
+    }
+
+    public void setIsAvailable(Boolean isAvailable) {
+        this.isAvailable = isAvailable;
+    }
+
+    public List<Long> getEquipmentIds() {
+        return equipmentIds;
+    }
+
+    public void setEquipmentIds(List<Long> equipmentIds) {
+        this.equipmentIds = equipmentIds;
+    }
+}