Add i18n.py and use it in v1/base.py and v1/cli.py

This follow similar pattern as other repositories like ceilometer.

Change-Id: Id9abda5720bd93d7fe68ee10deb124bdb665a430

observabilityclient/i18n.py

@@ -0,0 +1,21 @@
+#   Copyright 2023 OpenStack Foundation
+#
+#   Licensed under the Apache License, Version 2.0 (the "License"); you may
+#   not use this file except in compliance with the License. You may obtain
+#   a copy of the License at
+#
+#        http://www.apache.org/licenses/LICENSE-2.0
+#
+#   Unless required by applicable law or agreed to in writing, software
+#   distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#   WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#   License for the specific language governing permissions and limitations
+#   under the License.
+#
+
+import oslo_i18n
+
+_translators = oslo_i18n.TranslatorFactory(domain='observabilityclient')
+
+# The primary translation function using the well-known name "_"
+_ = _translators.primary

observabilityclient/v1/base.py

@@ -14,7 +14,8 @@
 #
 
 from osc_lib.command import command
-from osc_lib.i18n import _
+
+from observabilityclient.i18n import _
 
 
 class ObservabilityBaseCommand(command.Command):

observabilityclient/v1/cli.py

@@ -14,8 +14,7 @@
 
 from cliff import lister
 
-from osc_lib.i18n import _
-
+from observabilityclient.i18n import _
 from observabilityclient.utils import metric_utils
 from observabilityclient.v1 import base