IBM Cloud target

The most important changes:

• Adds a simplified version of the ibmcloud target which only shows the short name of the current account
• Solves a duplicate for direnv files (.envrc) in the git global ignore configuration file
• Terraform aliases reviewed
• Deactivates the github.com support by default
• zimfw module cleanup
• Change my color scheme from molokai to tempus
• Fixes the backup script