Feature/all archs (#21)

* add init subcommand

* add also init command to repository object

* add ability to generate list of architectures

* check if architecture list is not empty

tests/ahriman/application/handlers/test_handler_init.py

@@ -0,0 +1,18 @@
+import argparse
+
+from pytest_mock import MockerFixture
+
+from ahriman.application.handlers import Init
+from ahriman.core.configuration import Configuration
+
+
+def test_run(args: argparse.Namespace, configuration: Configuration, mocker: MockerFixture) -> None:
+    """
+    must run command
+    """
+    create_tree_mock = mocker.patch("ahriman.models.repository_paths.RepositoryPaths.create_tree")
+    init_mock = mocker.patch("ahriman.core.alpm.repo.Repo.init")
+
+    Init.run(args, "x86_64", configuration)
+    create_tree_mock.assert_called_once()
+    init_mock.assert_called_once()