Add "bash3boilerplate" from "https://git.knownelement.com/ExternalVendorCode/bash3boilerplate.git@main"

git-vendor-name: bash3boilerplate
git-vendor-dir: vendor/git.knownelement.com/ExternalVendorCode/bash3boilerplate
git-vendor-repository: https://git.knownelement.com/ExternalVendorCode/bash3boilerplate.git
git-vendor-ref: main

vendor/git.knownelement.com/ExternalVendorCode/bash3boilerplate/test/scenario/double-source/run.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+set -o pipefail
+set -o errexit
+set -o nounset
+# set -o xtrace
+
+__dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+__root="$(cd "$(dirname "$(dirname "$(dirname "${__dir}")")")" && pwd)"
+
+export LOG_LEVEL=7
+
+echo "ACCPTST:STDIO_REPLACE_DATETIMES"
+
+# shellcheck source=example.sh
+source "${__root}/example.sh" -f /tmp/x