Update CLI to sync with current Platform

[V2arK]

Failing tests:

Right now the failing one is for hidet, not really related to the CLI changes. But I will look into fixing it but not high priority.

Added features:

• added --version flags with cool ascii arts with version display
• changed centml cluster get to take in name of deployment rather than a type and id combo
• IN PROGRESS - Adding cluster create for creating deployment with interactive shell prompt

Upgrades

• Sync version with current platform release of v3.1.15 in setup.py, so does the external_client in the requirement.txt

[V2arK]

Create inference deployment done:

centml cluster create
Enter a name for the deployment: test
Select a deployment type (inference, compute, cserve): inference
Select a cluster (minikube): minikube
Select a hardware instance (small, medium, large): small
Minimum number of replicas [1]: 
Maximum number of replicas [1]: 
Max concurrency (or leave blank): 
Enter the image URL: nginxinc/nginx-unprivileged
Enter the container port [8080]: 
Enter healthcheck endpoint (default '/') [/]: 
Enter environment variables in KEY=VALUE format (comma separated) or leave blank: 
Inference deployment created with ID: 1729