fix: prevent adapter option collisions from bricking the CLI

[jaysaadana5]

Summary\n- skip webcmd shared execution flags when an adapter owns the same long option\n- keep adapter-owned colliding options out of output-format and runtime-global handling\n- cover collisions across output, tracing, verbose, and browser execution flags\n\nFixes #441\n\n## Verification\n- npm run typecheck\n- npm test -- src/command-surface.test.ts\n- npm test

[github-actions]

🟠 Maintainer review suggested — low confidence

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[ankitranjan7]

Thanks for the fix and the regression tests — merged!