Create POI Schema and Endpoints

[gracebw7]

Description
Create a Mongoose schema for the POI data in ../src/database/models and create API endpoints for the data.

Acceptance Criteria
The POI schema should include the following fields: id, name, description, audioFieId, isCompleted. Create 2 API endpoints for retrieving the POI's.

Steps:

• Create file for schema in ../src/database/models
• Add fields (id, name, description, audioField, isCompleted)
• Create folder "poi" under ../src/app/api
• Create file "route.ts" in poi
• Retrieve all POI's (../api/poi) GET
• Create folder "[_id]" in poi
• Create file "route.ts" in ../../id
• Get a specific POI by id (../api/poi/id) GET

devs: Tammy Tammy-si, Jason Jasonyu0705