Generate output using Doxygen / Breathe (#598)

* Modify Doxygen config to pick up include directories recursively

* Add DeviceMem struct to API Reference guide

* Add classes that are used in Flash Attention kernel

* Add a reference and config for generating bibliography

Co-authored-by: Philip Maybank <Philip.Maybank@amd.com>

[ROCm/composable_kernel commit: e4bf6d422e]

docs/source/conf.py

@@ -59,10 +59,13 @@ if read_the_docs_build:
 # Add any Sphinx extension module names here, as strings. They can be
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
-extensions = ['sphinx.ext.mathjax', 'breathe']
+extensions = ['sphinx.ext.mathjax', 'breathe', 'sphinxcontrib.bibtex']
+
 breathe_projects = { "CK": "../docBin/xml" }
 breathe_default_project = "CK"
 
+bibtex_bibfiles = ['refs.bib']
+
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']