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/main-usage-defaults/run.sh

@@ -0,0 +1,32 @@
+#!/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)"
+
+read -r -d '' __usage <<-'EOF' || true # exits non-zero when EOF encountered
+  -1 --one         Do one thing. Default="ONE"
+                   More description.
+  -2 --two         Do two things.
+                   More description. Default="TWO"
+  -3 --three [arg] Do three things. Default="'THREE'"
+                   More description.
+  -4 --four  [arg] Do four things.
+                   More description. Default='"FOUR"'
+  -5 --five  [arg] Do five things. Default="FIVE"
+                   More description. Default='OOOPS'
+  -6 --six   [arg] Do six things.
+                   More description.
+EOF
+
+export __usage
+
+echo "ACCPTST:STDIO_REPLACE_DATETIMES"
+
+# shellcheck source=main.sh
+source "${__root}/main.sh"
+
+for argument in ${!arg_*}; do info "${argument}: ${!argument}"; done