Adds src-tauri/src/discord_rpc.rs with DiscordRpcState (Mutex<Option<client>>
+ AtomicBool enabled) and three V2 commands:
- v2_discord_rpc_set_enabled
- v2_discord_rpc_update
- v2_discord_rpc_clear
Lazy connect on first update; silent degrade when Discord is unavailable.
Hardcoded Application ID 1501835855587708988 (public identifier).
Refs #336.
cc