docs: New README, two options to choose from right now (#59)

Reviewed-on: #59
Co-authored-by: Jean-Gabriel Gill-Couture <jg@nationtech.io>
Co-committed-by: Jean-Gabriel Gill-Couture <jg@nationtech.io>

docs/README.md

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+Not much here yet, see the `adr` folder for now. More to come in time!

docs/cyborg-metaphor.md

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+## Conceptual metaphor : The Cyborg and the Central Nervous System
+
+At the heart of Harmony lies a core belief: in modern, decentralized systems, **software and infrastructure are not separate entities.** They are a single, symbiotic organism—a cyborg.
+
+The software is the electronics, the "mind"; the infrastructure is the biological host, the "body". They live or die, thrive or sink together.
+
+Traditional approaches attempt to manage this complex organism with fragmented tools: static YAML for configuration, brittle scripts for automation, and separate Infrastructure as Code (IaC) for provisioning. This creates a disjointed system that struggles to scale or heal itself, making it inadequate for the demands of fully automated, enterprise-grade clusters.
+
+Harmony's goal is to provide the **central nervous system for this cyborg**. We aim to achieve the full automation of complex, decentralized clouds by managing this integrated entity holistically.
+
+To achieve this, a tool must be both robust and powerful. It must manage the entire lifecycle—deployment, upgrades, failure recovery, and decommissioning—with precision. This requires full control over application packaging and a deep, intrinsic integration between the software and the infrastructure it inhabits.
+
+This is why Harmony uses a powerful, living language like Rust. It replaces static, lifeless configuration files with a dynamic, breathing codebase. It allows us to express the complex relationships and behaviors of a modern distributed system, enabling the creation of truly automated, resilient, and powerful platforms that can thrive.