Merge device and inventory game design parameters

[Marius]

Describe the feature you would like
Please merge the game design parameters of microservice device and inventory in the rewrite of the backend.

Is your feature request related to a problem? Please describe.
Currently, hardware components, prices, index and categories are in two different files. This is error-prone and confusing.

Additional context
For now, the parameters can be managed in a file. However, editing them in a single file would be more convenient.
As more and more parameters are added, we will probably have to think of another way to edit them in the future.

For questions please contact @DevMimas

[Marius]

@Defelo and I have been talking about it.
The game parameter files are rewritten in the rewrite of the backend anyway. There will be no more microservices. Therefore they will be swapped out separately as JSON files. Issue can be closed.