feature request: Support existing plan as input

[xakraz]

Hi @patrickchugh !

Thanks for Terravision, it looks amazing 🙏🏻

Would it be possible to consume existing plans generated by terraform plan or terraform show -no-color -json output.tfplan > output.json instead of "running" Terraform from within Terravision? We have automation in places that already do these steps and it would be easier for us to integrate that way 😇

[patrickchugh]

Shouldn't be too hard to do, but Terravision also needs the output from the terraform graph command. Can your automations generate that beforehand too ?