Add glossary

Also sets up a structure in a "docs" subdirectory which might be useful
for other writeups.

Author: raphlinus

README.md

@@ -40,6 +40,10 @@ Both GLSL and WGSL are fairly primitive and low-level, not far removed from thei
 
 There are potentially many other paths to compute shader IR, including [IREE] which is mostly targeting machine learning applications.
 
+## Additional resources
+
+There are some more resources in the [docs/](./docs/) subdirectory, including a [glossary](./docs/glossary.md).
+
 ## Contributing
 
 This resource is open source and we welcome contributions to improve it. See [CONTRIBUTING.md] for more details.

docs/README.md

@@ -0,0 +1,7 @@
+# Additional compute shader documents
+
+This directory contains some resources that hopefully will be of interest to authors of compute shaders.
+
+These documents are a community resource, so please file issues or PRs if you can think of ways to improve them.
+
+* [Glossary](glossary.md)