feat: starterpack quote and purchase commands

[broodling-bot]

Summary

Add CLI commands to quote and purchase starterpacks.

Commands

controller starterpack quote [id]

Queries the starterpack contract quote entrypoint to retrieve the required payment token and amount, then displays it to the user.

controller starterpack purchase [id]

Purchase a starterpack. Mode is specified via flags:

--ui (UI Mode)

Opens a UI for the user to complete the purchase manually. Supports:

• Controller wallet funds
• Starknet external wallets
• Crosschain purchases via EVM wallets
• Apple Pay (coming soon)

--direct (Direct Mode)

Executes the purchase directly against the starterpack contract (issue entrypoint) using funds from the Controller wallet. Requires sufficient balance in the required payment token.

Starterpack Contract

• Contract address is hardcoded from the arcade repo
• quote entrypoint — returns the payment token and amount required
• issue entrypoint — executes the purchase

Notes

• UI mode is the most flexible path (external wallets, crosschain, Apple Pay)
• Direct mode skips the UI when funds are already available in the right token on the Controller