Added implementations of method achievements

[ospodaryk]

GreenCity PR

[User] Create achievements #6406

Summary Of Changes 🔥

Added new enum of achievements
Updated old implementation of achievement service

Added

New enum of achievements

Changed

Implementation of achievement service

Deleted

Unused methods and fields

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[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

96.2% Coverage
0.0% Duplication

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