Support OpenCritic as an Additional Game Metadata Source

[eikowagenknecht]

Is your feature request related to a problem? Please describe.

Context:

• Some games on Epic lack matches in IGDB/Steam databases (Please display the release date, score, etc on Epic Games html #427)
• Epic Store sometimes links directly to OpenCritic pages
• OpenCritic sometimes contains metadata for games missing from other sources (e.g. for the game "Undying")

Describe the solution you'd like

Add OpenCritic as a fallback metadata source when IGDB and Steam matches aren't found. Implement API integration to fetch game details, reviews, and related information from OpenCritic.

Anything else?

No response