feat: Add disable_nojekyll and cname options

- Add .nojekyll file by default for only the master and gh-pages branches. When the file already exists, this action does nothing.
- When we set other branches to publish_dir, this action does not add .nojekyll file.

cf. #112

Co-authored-by: Daniel Himmelstein <daniel.himmelstein@gmail.com>
Co-authored-by: Nicolas Vanhoren <nicolas.vanhoren@gmail.com>

action.yml

@@ -55,3 +55,10 @@ inputs:
   tag_message:
     description: 'Set tag message'
     required: false
+  disable_nojekyll:
+    description: 'Disable adding .nojekyll file to master or gh-pages branches'
+    required: false
+    default: 'false'
+  cname:
+    description: 'Set custom domain'
+    required: false