Create README.md

Author: jtnuttall

README.md

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+# heph
+
+heph is the umbrella project for Hephaestus, a rendering system built in Haskell. 
+It houses a collection of high-performance, low-level libraries designed for systems 
+programming.
+
+This repository is a monorepo containing the core, reusable components of the engine. 
+Each package is designed to be general-purpose and useful on its own.
+
+## Packages
+
+- heph-aligned-storable: A library to generically derive Storable instances suitable
+  for CPU-GPU transfer. It provides compile-time guarantees for spec-compliant memory
+  layouts (std140, std430, scalar).
+- heph-sparse-set: A mutable sparse set implementation, ideal for performance-critical
+  applications like Entity Component System (ECS) architectures.
+