[Enhancement] Add game aspects to the complete mission system

[maioni]

Is your feature request related to a problem? Please describe.
The application has no flow about how to repeat a same mission again.

Describe the solution you'd like
The same missions could be completed in a more gaming way, like complete 5 five time, you got brass medal, after complete 10 more times, a silver medal, and after 15 more times a gold medal. this way the user can complete a same mission 30 times to really finish it.

Describe alternatives you've considered
After complete the full medals system, it could be add a rank, like novice, or professional. Anything that could add a reward feeling to this mission system.

Additional context
N/A