🎨 Palette: [UX improvement] Enhance README accessibility and clarity

[Igor Holt (igor-holt)]

💡 What:

• Added a Mermaid architecture diagram to visualize the relationship between Cloud Native, Orchestration, and Infrastructure layers.
• Upgraded the "Experimental" status from a small badge to a high-visibility GitHub Alert ([!CAUTION]) with an explicit production use warning.
• Added a title attribute to the License badge for better accessibility and informative tooltips.

🎯 Why:

• Improves Developer Experience (DX) by providing a quick visual mental model of the system.
• Ensures users are clearly warned about the experimental nature of the project.
• Enhances accessibility for screen reader users and provides better context for mouse users.

♿ Accessibility:

• Added descriptive title attribute to the license badge.
• Improved badge alt-text to be more explanatory.

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PR created automatically by Jules for task 11987579521543185669 started by Igor Holt (@igor-holt)

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[gemini-code-assist]

Code Review

This pull request updates the README.md by enhancing the license badge, adding a prominent experimental status warning, and introducing an architecture diagram using Mermaid. A suggestion was made to use directed arrows in the diagram to better illustrate the flow of control between components.

[gemini-code-assist]

In architecture diagrams, using directed arrows (-->) instead of undirected lines (---) is generally preferred to clearly indicate the flow of control or data between components. This would better illustrate how the Arbiter orchestrates between the Kubernetes cluster and the underlying infrastructure layers.

Suggested change

	K8s --- Arbiter
	Arbiter --- Hardware
	Hardware --- aSHARD
	K8s --> Arbiter
	Arbiter --> Hardware
	Hardware --> aSHARD