UX: Make custom values feature discoverable

# Summary

Custom values features in helm charts/apps seems to be hidden. Thus, is less used.
We need to identify ways to make creating, using custom values upfront.

# Motivation

Custom values is a differentiating feature that currently goes unused as it seems to be hidden.

# Proposal

https://docs.google.com/document/d/1QjKvFUeLRSf5ovNVGGKoONSgFGAO6c9-vbPwTRZE6UQ/edit?usp=sharing