Hide Info,State,Instance

[bjoernQ]

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Submission Checklist 📝

• I have updated existing examples or added new ones (if applicable).
• I have used cargo xtask fmt-packages command to ensure that all changed code is formatted correctly.
• My changes were added to the CHANGELOG.md in the proper section.
• I have added necessary changes to user code to the Migration Guide.
• My changes are in accordance to the esp-rs API guidelines

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• I have read the CONTRIBUTING.md guide and followed its instructions.

Pull Request Details 📖

Description

Closes #2766 but not fully #2697 (besides hiding AlternateFunction - posted an open question there)

Additionally it marks gpio/etm, gpio/lp_io, gpio/rtc_io, gpio/etm, RtcPin, RtcFunction, WakeEvent, RtcPinWithResistors , AnalogPin, TouchPin as unstable.

TouchPin is feature gated by #[cfg(touch)]

No CHANGELOG.md entry (can add it if we want it - seems unnecessary since one of the main things to mention for the next release is the introduction of the unstable feature)

Testing

n.a. / builds passing