Add bulk region hierarchy command to CLI

[agessaman]

Add a new command region bulk for defining region hierarchies in a single line. This command allows users to create multiple regions in a single message. Updated the documentation to include usage examples and detailed parameter descriptions.

The primary use-case here is improving the regions configuration process by requiring fewer command messages to load a full set of regions on a repeater. This has the additional benefit that regions can be configured or reconfigured at multiple hops with more reliability—with region load or region put a dropped message can frustrate or break the configuration process.

[AI7NC]

This idea has my full support. This will allow much simpler regional loads for repeater operators by condensing in my region 8 load commands into a single command.

[towerviewcams]

8 load commands with many repeaters that I host will create allot of traffic and retry attempts. Anything that can be done to reduce and make this process more efficient should be considered.

[ripplebiz]

I quite like this. A nifty shorthand.
I think 'region def ...' would prob read better than 'bulk'. Plus you get an extra byte! :-)