feat(cli): add exists and unset commands #4

	name: CI

	on:
	push:
	branches: [main]
	pull_request:

	jobs:
	build-test:
	name: Build and Test (${{ matrix.os }})
	runs-on: ${{ matrix.os }}
	strategy:
	fail-fast: false
	matrix:
	os: [ubuntu-latest, macos-latest]

	steps:
	- name: Checkout
	uses: actions/checkout@v5

	- name: Set up Go
	uses: actions/setup-go@v6
	with:
	go-version-file: go.mod
	cache: false

	- name: Format check
	run: \|
	fmt_out=$(gofmt -l .)
	if [ -n "$fmt_out" ]; then
	echo "The following files are not gofmt-formatted:"
	echo "$fmt_out"
	exit 1
	fi

	- name: Vet
	run: go vet ./...

	- name: Test
	run: go test ./...

	- name: Build
	run: go build ./...

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