feat: add values schemas

[Jorgagu]

This pull request introduces schema validation for values.yaml files in the Sentry Helm charts and includes minor formatting fixes in the documentation. The most important changes are the addition of JSON schema files for validation and updates to the README files to guide users on enabling this feature in supported editors.

Schema Validation for Helm Charts

• Added a JSON schema file (charts/sentry-kubernetes/values.schema.json) to validate values.yaml files for the sentry-kubernetes chart.
• Added a JSON schema file (charts/sentry/values.schema.json) to validate values.yaml files for the sentry chart.
• Added schema validation instructions to charts/sentry/README.md for the main Sentry chart, including how to configure editor support.
• Added schema validation instructions to charts/sentry-kubernetes/README.md for the Sentry Kubernetes chart, including how to configure editor support.

Documentation Formatting Fixes

• Fixed table formatting in charts/sentry-kubernetes/README.md and charts/sentry/README.md for improved readability. [1] [2]

[Jorgagu]

👋 @Mokto, could you please review this PR ? Thanks 😄

[Mokto]

Nice. How do we maintain this?

[Jorgagu]

Thanks for the quick review! I initially generated the JSON Schema files using the unmaintained helm-schema-gen plugin, but I’ve now switched to the actively maintained helm-schema plugin.

Updated workflow:

1. Install the plugin:

   helm plugin install https://github.com/dadav/helm-schema

2. Generate the schema in the chart directory:

   cd charts/sentry
   helm schema

I’ll add these steps to the Schema Validation section of the README so contributors can regenerate the schema locally.

We could also automate this via a GitHub Action that runs helm schema with dry-run flag on each push and fails if values.yaml and values.schema.json get out of sync.

[Mokto]

That's good enough for me for now ;)

But the CI is failing.

[Jorgagu]

Hi @Mokto,

@TartanLeGrand and I noticed that many Bitnami charts either lack a values.schema.json entirely or include one that doesn’t accurately reflect their values.yaml.

I opened an issue to centralize discussion here: bitnami/readme-generator-for-helm#142

To move forward, we have two options:

1. Migrate our tooling from dadav/helm-schema to readme-generator-for-helm] so that it generates values.schema.json strictly from our charts’ values.yaml—without pulling in schema from dependencies.
2. Ask Bitnami to update every chart’s values.yaml and values.schema.json so they stay in sync.

Which approach do you prefer?

[Mokto]

I would go for option 1 as option 2 might take ages.

[Jorgagu]

Yes, I agree with you. I'll be working on this option by the end of the week.