[codex] add update_all launcher modal

[asturur]

Summary

• add a Hub download utility icon reachable by D-pad
• run MiSTer update_all through a PTY-backed Rust singleton
• show live output in a blocking modal with D-pad, A/Enter, B/Esc input forwarding

Validation

• ./scripts/build-arm32.sh

a577b787-ca25-4aad-8384-399ee86db589.mov

just for fun i do not think is usable as is. but want to see if it would spin conversations

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