Force creation of GitHub Actions CI workflow

Since we switched to using `.yml` for YAML files in #1246, generating
the CI config would clash and request the user intervene. We force the
template to overwrite instead.

Completes #1243.

lib/generators/suspenders/ci_generator.rb

@@ -12,8 +12,7 @@ class CiGenerator < Rails::Generators::Base
       MARKDOWN
 
       def ci_files
-        empty_directory ".github/workflows"
-        template "ci.yml", ".github/workflows/ci.yml"
+        template "ci.yml", ".github/workflows/ci.yml", force: true
       end
 
       private

test/generators/suspenders/ci_generator_test.rb

@@ -11,6 +11,9 @@ class CiGeneratorTest < Rails::Generators::TestCase
       teardown :restore_destination
 
       test "generates CI files" do
+        mkdir_p(".github/workflows")
+        touch(".github/workflows/ci.yml")
+
         with_database "postgresql" do
           run_generator
 

test/test_helper.rb

@@ -38,6 +38,12 @@ def mkdir(dir)
     FileUtils.mkdir path
   end
 
+  def mkdir_p(dir)
+    path = app_root dir
+
+    FileUtils.mkdir_p path
+  end
+
   def touch(file, **options)
     content = options[:content]
     path = app_root file