Add superlinter #227

	name: Cargo checks

	on:
	pull_request:
	push:
	branches:
	- main

	jobs:
	cargo-checks:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v3
	- uses: actions-rs/toolchain@v1
	with:
	profile: minimal
	components: rustfmt, clippy
	- name: Check formatting
	run: cargo fmt --all -- --check
	- name: Clippy
	run: cargo clippy --all
	- name: build docker image
	run: docker build docker -t ponylang-playpen
	- name: Cargo test
	run: cargo test --all -- --nocapture

Provide feedback