pio 0.3.0

Support for the Raspberry Silicon RP2040's PIO State Machines.
Documentation
on:
  push:
    branches:
      - main
  pull_request:
    branches:
      - main

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: actions-rs/toolchain@v1
        with:
          toolchain: stable
      - run: cargo clippy --all-targets --all-features -- -D warnings
      - run: cargo test --workspace
      - run: cargo fmt -- --check