Plugin improvements

- Improved newly created plugins
  - Fixed badge URL (#4948)
  - Fixed detection of existing plugins (#4957)
  - Added example `Fastfile` and `Pluginfile` to new plugin so it's easy to try out (#4950)
- [testfairy action] enable parameters/options (#4818)

https://github.com/fastlane/fastlane/releases/tag/1.93.1
