Update Helm installation documentation

[tartkri-bot]

Summary

With the new OpenEverest Helm chart repository available at openeverest/helm-charts, the documentation needs to be updated to reflect the new installation method and provide migration instructions for existing users.

Tasks

1. Update installation instructions

Replace all references to Percona Helm charts with the new OpenEverest Helm repository:

helm repo add openeverest https://openeverest.github.io/helm-charts/
helm repo update
helm install everest openeverest/everest \
  --namespace everest-system \
  --create-namespace

2. Add migration guide for existing users

Create a short migration instruction for users who previously installed OpenEverest from the Percona Helm repository and now want to upgrade to the new openeverest/helm-charts:

• How to switch from Percona Helm to OpenEverest Helm
• Any breaking changes or considerations
• Steps to ensure a smooth transition

Affected Documentation Pages

Please review and update all documentation pages that mention Helm installation, including:

• Installation guides
• Quick start documentation
• Upgrade instructions
• Any troubleshooting sections related to Helm

Related

• New Helm charts repository: https://github.com/openeverest/helm-charts
• This is part of the Helm chart migration effort tracked in the main project

[spron-in]

relates to openeverest/openeverest#1874

[spron-in]

Fixed