Clearer Microsoft auth UI + fix spawn timeout race

Fix spawn timeout race with Microsoft auth flow

Add 60s spawn timeout to prevent infinite hang

Auto-accept resource packs to avoid kick

Add connectTimeout + Server Ping feature (mc-protocol ping)

Add connectTimeout (30s) to prevent hanging connections

Add Minecraft 1.21.4 support to version dropdown

Fix Dockerfile: use npm install instead of npm ci

Upload Mineflayer Bot Manager with Dashboard

initial commit