Migrate codebase to use data from PostGIS

[35C4n0r]

Title

Migrate GeoJSON Data to PostGIS and Update Codebase to Use Prisma ORM

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Description

Migrate existing files in the codebase to use Prisma ORM for database interactions.

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Checklist

• [ ] LocationService
• [ ] LocationController
• [ ] GeorevService
• [ ] GeorevController
• [ ] CityService
• [ ] CityController
• [ ] AppService
• [ ] AppController
• [ ] PrismaService to handle PostGIS interactions.

Closes #125

[SanjanaSogimatt]

Is it possible for me work on this issue?