Switch project to bug-fix only mode

[kvendingoldo]

• Check that tenv have the same functionalities as tofuenv. If something is missing, add support of missing parts to tenv
• Make the last public release of tofuenv, add information about tenv to tofuenv help
• Add brew migrations to homebrew-tap repo
• Add information about tenv to README.md; All new feature requests should be created in tenv repo

[dvaumoron]

I have done a quick check at tofuenv readme :

• tofuenv version-name translate to tenv detect
• tofuenv pin translate to tenv use -w

There are more env var supported by tofuenv, i do not know which are important