H2: Add BLE support

[JurajSadel]

Closes #93
Closes #286

[bjoernQ]

This should probably wait for #342 to get merged first

[bugadani]

I'm not 100% sure this PR should be blocked on another that is mostly independent of H2 support, but either way I'm not a fan of silently and partially undoing #340 just because some features need to be enabled on a ble example.

[bjoernQ]

We should certainly not undo #340
This PR needs "esp-hal-next" and #342 prepares for that as far as I can see

[bugadani]

Fair point. I think now that the first esp-wifi release is available we no longer have to exclusively target released esp-hal versions and these PRs can be pushed forward.

[bjoernQ]

Fair point. I think now that the first esp-wifi release is available we no longer have to exclusively target released esp-hal versions and these PRs can be pushed forward.

I agree - with esp-wifi on crates.io we have more freedom on the main branch

[bugadani]

Please add "Closes #93" to the opening message or link that issue. I believe there is no reason for keeping that open if this PR lands.

[bjoernQ]

LGTM!