Fix live display formatting on macOS Terminal.app

[calm329]

Summary

This PR fixes the live display formatting issues on macOS's stock Terminal.app for the subnets list --live and stake list --live commands.

Problem

The --live flag for btcli subnets list and btcli stake list commands uses Rich's Live component with screen=True, which enables alternate screen buffer mode. However, macOS's native Terminal.app has known compatibility issues with alternate screen buffer rendering, causing visual corruption and misaligned output.

More capable terminals like iTerm2 handle this correctly, but users on the stock Terminal.app experience broken formatting.

Changes

File: bittensor_cli/src/commands/subnets/subnets.py

1. Removed screen=True parameter from the Live context manager
   • The live display now renders inline instead of using alternate screen buffer

File: bittensor_cli/src/commands/stake/list.py

1. Removed screen=True parameter from the Live context manager
   • Consistent fix applied to stake list live mode

Before & After

Before (macOS Terminal.app):

After (macOS Terminal.app):

Fixes #315

---

Contribution by Gittensor, learn more at https://gittensor.io/