Add missing external-crates concept #24

	# This workflow will do a clean install of the dependencies and run tests across different versions
	#
	# Replace <track> with the track name
	# Replace <image-name> with an image to run the jobs on
	# Replace <action to setup tooling> with a github action to setup tooling on the image
	# Replace <install dependencies> with a cli command to install the dependencies
	#
	# Find Github Actions to setup tooling here:
	# - https://github.com/actions/?q=setup&type=&language=
	# - https://github.com/actions/starter-workflows/tree/main/ci
	# - https://github.com/marketplace?type=actions&query=setup
	#
	# Requires scripts:
	# - bin/verify-exercises

	name: <track> / Test

	on:
	push:
	branches: [main]
	pull_request:
	workflow_dispatch:

	jobs:
	ci:
	runs-on: <image-name>

	steps:
	- name: Checkout repository
	uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29

	- name: Use <setup tooling>
	uses: <action to setup tooling>

	- name: Install project dependencies
	run: <install dependencies>

	- name: Verify all exercises
	run: bin/verify-exercises

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