Proxy Support in BTCLI

[chideraao]

Currently, proxy functionality on Bittensor (e.g., adding, removing, or managing proxy accounts) can only be performed by directly calling the corresponding chain extrinsics. There’s no BTCLI interface to handle these operations.

Suggested command:
Introduce a new set of proxy-related subcommands under a btcli proxy group, for example:

• btcli proxy add
• btcli proxy remove (maybe an --all flag for removeProxies extrinsic)
• btcli proxy create-pure
• btcli proxy kill-pure
• btcli proxy execute (?)
• btcli proxy list (?)
• btcli proxy announce for delayed proxies (?)
  • reject
  • remove
  • execute (?)

Relevant docs:

• https://docs.learnbittensor.org/keys/proxies
• https://docs.learnbittensor.org/keys/proxies/create-proxy
• https://docs.learnbittensor.org/keys/proxies/pure-proxies