Prepare AdbPureFlow for Windows verification

[arena-ai-coding-agent]

Summary

• Reworks the existing Go/Fyne app toward a Windows-first Android device workstation architecture.
• Adds verification-focused documentation: Windows smoke test, real-device matrix, troubleshooting, release checklist, Windows readiness, and Wireless Debugging notes.
• Hardens ADB/scrcpy/APK/log/workflow core behavior and adds unit coverage for deterministic pieces.
• Adds a Windows build script and release README template.
• Removes checked-in generated binaries/runtime tool artifacts and adds ignore rules.

Important note

This PR intentionally does not include changes under .github/workflows/ because the current GitHub App permissions cannot update workflow files from this environment.

Verification run in sandbox

• Go formatting via temporary Go toolchain.
• GUI hardware-free core tests: go test app.go app_test.go.
• GUI hardware-free race test: go test -race app.go app_test.go.
• GUI hardware-free vet: go vet app.go.
• CLI tests: go test ./....
• CLI vet: go vet ./....
• git diff --check.

Not verified here

• Full Fyne GUI dependency build; sandbox could not fetch Fyne modules.
• Windows build/runtime.
• Real Android USB/Wireless Debugging.
• scrcpy runtime.
• QR pairing; not implemented and documented as unavailable.

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