feat: improve script input for PowerShell compatibility

[SawyerHood]

Summary

• add explicit --script/-e and --file/-f CLI paths so PowerShell users can pass scripts without --connect consuming them as the optional CDP URL
• keep stdin and run FILE support, and add CLI parser tests covering the new script/file inputs
• document PowerShell-friendly examples in the CLI help guide and README

Validation

• cd daemon && pnpm bundle
• cd daemon && pnpm bundle:sandbox-client
• cd cli && cargo build
• cd cli && cargo fmt -- --check
• cd cli && cargo test
• cd daemon && npx tsc --noEmit
• cd daemon && pnpm vitest run