[Feature]: Multi-region master channels with region-specific overrides

**Platform:** Other

**Description:**
for multiregions, have a master section for channels that affect all sub regions, but also have sub regions add their own channels

**Discord:** https://discord.com/channels/1463383723327356992/1486889617830576148/1539698721976230080

Submitted by: chrisdavis2110 (Discord)