Initialize charts repository and add katalog-example chart

[iAlexeze]

Summary

The charts repo will serve as the central location for all shared Helm charts used across orkspace. This initial setup establishes the baseline structure and adds a reference chart that demonstrates how to package Orkestra Katalog definitions inside a Helm chart.

Included in this PR

1. Repository Initialization

• Added base directory structure for hosting multiple charts.
• Added a top-level README describing the purpose of the charts repo.
• Added a CHANGELOG following Keep a Changelog format.

2. katalog-example Chart

• Introduced a minimal example chart that renders an Orkestra Katalog.
• Includes:
  • Chart.yaml
  • values.yaml
  • templates/katalog.yaml
• Demonstrates how platform teams can ship CRD behavior definitions via Helm for consumption in Komposer (sources.helm).

Purpose

This establishes the foundation for:

• Publishing shared charts to Artifact Hub
• Referencing charts from Komposer
• Maintaining versioned, reusable platform components

Future charts (Redis, Postgres, MinIO, etc.) will follow this structure.

Next Steps

• Add CI workflow for packaging and publishing charts to GHCR.
• Add schema validation for chart values.
• Add additional shared charts as orkspace evolves.