Tracking issue to reduce boilerplate

[bugadani]

The goal of this issue is to lower the amount of code the users need to write for no good reason.

• Simplify initialization APIs #1957
• esp_hal_embassy: Implement timer conversion for some arrays #2012
• Rework hal initialization #1970
• Remove the need to manually pass clocks around #1999
• Remove most trait implementation features from esp-hal #2070
• SPI pins are no longer optional #2133
• Remove PcntSource #2134
• Type-erase timers by default #2136

Feel free to share your pain point if you have any!

[scottdalgliesh]

Would it make sense to also initialize and return the io driver by default in esp_hal::init? It seems like most use cases will require access to io, but I could certainly be overlooking/misunderstanding something.

Regardless, great work on these simplifications - love to see it.

[bugadani]

^ a good thing to keep in mind, although we deliberately don't initialize any peripherals at this point.