feat(scripts): add fixtures.sh to add license to dev deployment (#19374)

Adds `scripts/fixtures.sh` with initial support for adding license.
Future improvements may involve adding + breaking out:
- User creation
- Template creation/import
- Org creation

scripts/fixtures.sh

@@ -0,0 +1,56 @@
+#!/usr/bin/env bash
+
+SCRIPT_DIR=$(dirname "${BASH_SOURCE[0]}")
+# shellcheck source=scripts/lib.sh
+source "${SCRIPT_DIR}/lib.sh"
+
+CODER_DEV_SHIM="${PROJECT_ROOT}/scripts/coder-dev.sh"
+
+add_license() {
+	CODER_DEV_LICENSE="${CODER_DEV_LICENSE:-}"
+	if [[ -z "${CODER_DEV_LICENSE}" ]]; then
+		echo "No license provided. Please set CODER_DEV_LICENSE environment variable."
+		exit 1
+	fi
+
+	if [[ "${CODER_BUILD_AGPL:-0}" -gt "0" ]]; then
+		echo "Not adding a license in AGPL build mode."
+		exit 0
+	fi
+
+	NUM_LICENSES=$("${CODER_DEV_SHIM}" licenses list -o json | jq -r '. | length')
+	if [[ "${NUM_LICENSES}" -gt "0" ]]; then
+		echo "License already exists. Skipping addition."
+		exit 0
+	fi
+
+	echo -n "${CODER_DEV_LICENSE}" | "${CODER_DEV_SHIM}" licenses add -f - || {
+		echo "ERROR: failed to add license. Try adding one manually."
+		exit 1
+	}
+
+	exit 0
+}
+
+main() {
+	if [[ $# -eq 0 ]]; then
+		echo "Available fixtures:"
+		echo "  license: adds the license from CODER_DEV_LICENSE"
+		exit 0
+	fi
+
+	[[ -n "${VERBOSE:-}" ]] && set -x
+	set -euo pipefail
+
+	case "$1" in
+	"license")
+		add_license
+		;;
+	*)
+		echo "Unknown fixture: $1"
+		exit 1
+		;;
+	esac
+}
+
+main "$@"