homeassistant-useradd.inc: Provide an inc file for the HA useradd configuration

This inc file is useful so multiple recipes can synchronise on the same
user configuration. For example, a recipe bringing a custom Home
Assistant configuration would use this to set the proper user ownership
of the configuration file.

Signed-off-by: Andrei Gherzan <andrei.gherzan@huawei.com>

meta-ohos-blueprints/recipes-homeassistant/homeassistant/homeassistant-useradd.inc

+# SPDX-FileCopyrightText: Huawei Inc.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+inherit useradd
+
+HOMEASSISTANT_USER ?= "homeassistant"
+HOMEASSISTANT_USER[doc] = "User the home-assistent service runs as."
+
+USERADD_PACKAGES = "${PN}"
+GROUPADD_PARAM_${PN} = "--system homeassistant"
+USERADD_PARAM_${PN} = "\
+    --system --no-create-home --shell /bin/false \
+    --home ${HOMEASSISTANT_CONFIG_DIR} \
+    --groups homeassistant,dialout --gid homeassistant \
+    ${HOMEASSISTANT_USER}"