Move the mastodon/*_cli files to mastodon/cli/* (#24139)

spec/lib/mastodon/cli/main_spec.rb

@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+require 'mastodon/cli/main'
+
+describe Mastodon::CLI::Main do
+  describe 'version' do
+    it 'returns the Mastodon version' do
+      expect { described_class.new.invoke(:version) }.to output(
+        a_string_including(Mastodon::Version.to_s)
+      ).to_stdout
+    end
+  end
+end