Plugins: Terraform (#6373)

Expanded Terraform plugin with function that can be used to show workspace name in the zsh prompt

plugins/terraform/terraform.plugin.zsh

@@ -0,0 +1,7 @@
+function terraform_prompt_info() {
+    # check if in terraform dir
+    if [ -d .terraform ]; then
+      workspace=$(terraform workspace show 2> /dev/null) || return
+      echo "[${workspace}]"
+    fi
+}