exercise: add `space-age` #40

	name: CI

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

	env:
	CARGO_TERM_COLOR: always

	jobs:
	find-exercises:
	name: Find exercises
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- id: find-exercises
	run: \|
	echo \
	"exercises=$(ls exercism/rust \| jq -R -s -c 'split("\n")[:-1]')" \
	>> "$GITHUB_OUTPUT"
	outputs:
	exercises: ${{ steps.find-exercises.outputs.exercises }}

	check:
	name: Check '${{ matrix.exercise }}'
	needs: find-exercises
	runs-on: ubuntu-latest
	strategy:
	fail-fast: false
	matrix:
	exercise: ${{ fromJson(needs.find-exercises.outputs.exercises) }}
	steps:
	- uses: actions/checkout@v4
	- name: Check formatting for '${{ matrix.exercise }}'
	run: cargo fmt -- --check
	working-directory: exercism/rust/${{ matrix.exercise }}
	- name: Lint '${{ matrix.exercise }}'
	run: cargo clippy --all-targets --all-features
	working-directory: exercism/rust/${{ matrix.exercise }}
	- name: Check documentation for '${{ matrix.exercise }}'
	run: cargo doc --no-deps --document-private-items --all-features
	working-directory: exercism/rust/${{ matrix.exercise }}
	- name: Check build for '${{ matrix.exercise }}'
	run: cargo check --verbose
	working-directory: exercism/rust/${{ matrix.exercise }}
	- name: Build '${{ matrix.exercise }}'
	run: cargo build --verbose
	working-directory: exercism/rust/${{ matrix.exercise }}
	- name: Run tests for '${{ matrix.exercise }}'
	run: cargo test --verbose
	working-directory: exercism/rust/${{ matrix.exercise }}

	success:
	name: Success
	needs: check
	runs-on: ubuntu-latest
	steps:
	- run: echo "Success!"

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