fix(init): keep select prompts within terminal

[betegon]

Summary

Keep Ink select and multiselect prompts within the available terminal height by rendering a moving option window. Long labels stay on one row, and position indicators make hidden options discoverable without changing keyboard navigation.

This covers the sentry init team picker and the shared prompt UI used by other long lists.

Closes #1376.

Test plan

• pnpm exec vitest run test/lib/init/ui/ink-app.snapshot.test.tsx test/lib/init/ui/ink-app.property.test.ts — 26 tests passed
• pnpm run lint — 972 files checked
• pnpm run typecheck
• pnpm run check:fragments — passed with the existing unrelated proguard upload coverage warning
• Manual TTY smoke test at 24x120 with 26 teams: navigated from (1/26) to (26/26) while the footer remained visible
• Full unit suite: 9,039 passed and 17 skipped; reproduced the same 8 environment-dependent failures already documented on unchanged main (6 timezone assertions and 2 bash completion shell simulations)

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