Generate Roku package plans

[Photon101]

Summary

• validate Roku channel source directories and parse the Roku manifest file
• require title and version fields and verify referenced focus icon assets when present
• write a roku-package-plan.json with package file list, expected zip path, zip command, and submission metadata
• return package-plan metadata from build and channel submission metadata from ship
• add focused tests for plan output, dry-run ship, real ship metadata, and manifest validation failures

Validation

• corepack pnpm exec vitest run packages/targets/tv-roku/src/index.test.ts
• corepack pnpm exec tsc -p packages/targets/tv-roku/tsconfig.json --noEmit
• corepack pnpm --filter @profullstack/sh1pt-target-tv-roku build
• git diff --check