Enhancements:

* Runner is now written in Go

* Cache docker layers in GitHub Actions builds

* CI/CD embeds version info using -ldflags

* Controller and Runner now have --help and --version flags

Bug fixes:

* Running cards don't show the video encoding symbol (#75)

* The Controller still deletes the original file even if the Runner reports that it failed (#81)

Documentation:

* Added Go version badge for Runner

* Added Cross-platform as a reason for choosing Encodarr

* Added TZ env var to Docker and Docker Compose commands

* Rewrite Startup Configuration section for the Runner to match the options available with the Go Runner

* Remove Go Runner from Future Plans section