For v1 we have a table in the README that explains the values, their descriptions and what their defaults are. We should have a similar README for helm in v2 so people know what values are available.

As part of adding the Helm chart I have already added helm-docs-compatible comments above each value so all that is left is writing the README template and adding CI to ensure it's generated properly.

Success criteria:

• Add helm/README.md
  • Links to our Helm installation documentation (after Write documentation for how to use helm chart #3224)
  • Has a table of values generated by helm-docs
• Add CI to ensure that helm/README.md stays up-to-date as part of the fmt job