Correctly support ESP8266 for examples and default filters

[mathieucarbou]

This PR allows to run examples on esp8266 (WiFi was not activated).

It also corrects the default filters ON_STA_FILTER and ON_AP_FILTER

[coderabbitai]

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✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch exemples-8266

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[willmmiles]

We really need to pull that test in to a single macro in a shared header..

[mathieucarbou]

We really need to pull that test in to a single macro in a shared header..

yes indeed... 😅

[mathieucarbou]

We really need to pull that test in to a single macro in a shared header..

done ;-)