Raise BF2 game info to Discord using Rich Presence

[TwitchPlaysBF2]

Use DiscordRPC like in https://github.com/community-network/Battlefield-rich-presence 👌🙏💯

• [x] #25
• [ ] Extract #25 into a NuGet package & replace with reference
• [ ] Figure out UI/UX where to put that setting in a present way, so that users get it
• [ ] Introduce on/off setting, whether to share the games status with Discord or not