wip: Release rp235x-hal v0.3.0

[winksaville]

Still need to add #PR and @user-name to CHANGELOG.md

I've verified that cargo run-arm --release --bin blinky and cargo run-riscv --release --bin blinky work.

[winksaville]

@9names, @thejpster is there an automated way to generate the commit subject, PR number and user name?

[9names]

Not that I'm aware of. I've always written out the change myself, since not everyone clearly specifies the change in the PR name, and if they do they do not do so consistently. And sometimes you want to write more about a change than most folks do in PR names or commit messages

[thejpster]

GitHub can make these kinds of change logs. Someone could make a draft release and then copy the contents.

[9names]

Interesting. Well, considering that winksaville can't create a release here, I went and did it. Here's what it spat out

## What's Changed
* Run picotool step in github action by @jannic in https://github.com/rp-rs/rp-hal/pull/857
* spi: remove undesired parameter to `set_format` by @jannic in https://github.com/rp-rs/rp-hal/pull/860
* Fix warning with rust 1.82.0 by @jannic in https://github.com/rp-rs/rp-hal/pull/863
* Update critical-section dependency to version 1.2.0 by @jannic in https://github.com/rp-rs/rp-hal/pull/862
* Fix or surpress several warnings on rust beta by @jannic in https://github.com/rp-rs/rp-hal/pull/865
* Add debug derive for the GPIO structures by @robamu in https://github.com/rp-rs/rp-hal/pull/861
* implement Debug support for the GPIO structures (RP235x) by @jannic in https://github.com/rp-rs/rp-hal/pull/866
* feat: add support for PIO `in_count` by @allexoll in https://github.com/rp-rs/rp-hal/pull/868
* feat: Make it easier to specify target architecture by @winksaville in https://github.com/rp-rs/rp-hal/pull/869

## New Contributors
* @robamu made their first contribution in https://github.com/rp-rs/rp-hal/pull/861
* @allexoll made their first contribution in https://github.com/rp-rs/rp-hal/pull/868
* @winksaville made their first contribution in https://github.com/rp-rs/rp-hal/pull/869

**Full Changelog**: https://github.com/rp-rs/rp-hal/compare/rp235x-hal-0.2.0...rp235x-hal-0.3.0

[9names]

Closing this PR as release 0.3.0 happened via #901