[docs] Review the tenant Kubernetes cluster docs

[NickVolynkin]

Summary by CodeRabbit

• Documentation
  • Completely overhauled and expanded the Managed Kubernetes Service guide for Cozystack.
  • Added detailed explanations of service architecture, tenant isolation, and use cases.
  • Included step-by-step instructions for accessing tenant clusters and kubeconfig files.
  • Expanded configuration parameters with clear tables and recommendations.
  • Introduced a comprehensive resource reference and improved descriptions of instance types and series.

[coderabbitai[bot]]

Walkthrough

The README.md for the Managed Kubernetes Service in the Cozystack app was extensively rewritten and expanded. The update introduces detailed explanations of service architecture, usage instructions, configuration options, and resource references, transforming the document into a comprehensive guide for users of the managed Kubernetes offering. Additionally, the Kubernetes app's JSON schema and values.yaml were refined to clarify resource configuration options and improve documentation consistency.

Changes

File(s)	Change Summary
packages/apps/kubernetes/README.md	Major rewrite and expansion: clarified service architecture, added usage instructions, configuration tables, resource references, and restructured content for clarity and completeness.
packages/apps/kubernetes/values.schema.json	Added explicit resources object alongside resourcesPreset for control plane components; improved descriptions and removed duplicate entries; standardized addon and parameter descriptions.
packages/apps/kubernetes/values.yaml	Updated comments for clarity and consistency: standardized capitalization, punctuation, and phrasing; reordered resource preset explanations without changing functional content.

Possibly related PRs

• cozystack/cozystack#866: Refactors control plane resource configuration keys and documentation from kamajiControlPlane to controlPlane, updating related Helm templates and schema, closely related to control plane configuration changes in this PR.

Suggested reviewers

• klinch0
• kvaps
• lllamnyp

Poem

In cozy stacks where clusters grow,
A README blooms, with knowledge to show.
From YAMLs and pods to VMs in flight,
Tenant and root, now clearly in sight.
With tables and tips, the guide is complete—
Kubernetes wisdom, a rabbit’s treat! 🐇✨

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