Add release action

[arthurbdiniz]

Helps #5

This PR adds an action to build the binaries and create a release just by creating a tag.

How to create a release

git tag <new-tag>
git push origin  <new-tag>

Release output

Then the users can:

1. Download the latest release’s tarball for your client platform.
2. Extract the tarball:

tar -xvf <RELEASE-TARBALL-NAME>.tar.gz

3. Move the extracted tfk8s binary to somewhere in your $PATH (/usr/local/bin for most users).

[Rishang]

Thanks for the PR i just recently raised issue for this #53 @jrhouston this would be helpful