Add readmes

programming_examples/experimental/README.md

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+# Experimental Example
+
+This example showcases what a higher-level (above IRON) syntax might look like one day for programming NPUs. It is designed to be at a similar level of abstraction to cupy.
+Run the design with:
+```bash
+./example.py
+```
+
+Warning: This example is very brittle. The support for this syntax is strictly proof-of-concept and any changes to the design will likely be beyond what the current implementation supports.

python/iron/experimental/README.md

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+# Experimental Backend
+
+These files are the backend for the proof-of-concept example found in `programming_examples/experimental`. The implementation here is narrow (and brittle). A more complete backend of this experimental syntax should likely be backed by something similar to a compiler, to avoid an undisciplined soup of heuristics.