Add Concept Exercise Metadata files: the-realm-of-echoes (#326) #658

	# This workflow will do a clean install of the dependencies and run tests across different versions

	name: Verify

	# Run this workflow every time a new commit is pushed to the repository
	on:
	push:
	branches: [main]
	pull_request:
	workflow_dispatch:
	schedule:
	# Weekly.
	- cron: "0 0 * * 0"

	jobs:
	# borrowed from https://raw.githubusercontent.com/exercism/github-actions/main/.github/workflows/shellcheck.yml
	shellcheck:
	name: Run shellcheck on scripts
	runs-on: ubuntu-22.04
	steps:
	- name: Checkout
	uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683

	- name: Run shellcheck
	uses: ludeeus/action-shellcheck@00cae500b08a931fb5698e11e79bfbd38e612a38

	build:
	name: Build and test
	runs-on: ubuntu-22.04

	steps:
	- name: Checkout code
	uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683

	- name: Fetch origin/main
	run: git fetch --depth=1 origin main

	- name: Getting scarb
	uses: software-mansion/setup-scarb@v1
	with:
	scarb-version: "2.9.2"

	- name: Verify all exercises
	env:
	DENYWARNINGS: "1"
	run: bin/verify-exercises

	format:
	name: Format Cairo files
	runs-on: ubuntu-22.04

	steps:
	- name: Checkout code
	uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683

	- name: Getting scarb
	uses: software-mansion/setup-scarb@v1
	with:
	scarb-version: "2.9.2"

	- name: Format
	run: ./bin/format_exercises.sh --check

	- name: Diff
	run: \|
	if ! git diff --color --exit-code; then
	echo "Please run cargo fmt, or see the diff above:"
	exit 1
	fi

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