Add initial cuda-lang docs

Signed-off-by: Jay Gu <jagu@nvidia.com>

Author: haijieg

.flake8

@@ -10,11 +10,11 @@ exclude =
     build,
     env,
     dist,
-    docs/build,
-    docs/source/generated,
-    docs/source/stubs,
-    docs/venv,
-    docs/source/_templates,
+    *docs/build,
+    *docs/source/generated,
+    *docs/source/stubs,
+    *docs/venv,
+    *docs/source/_templates,
     experimental/cuda-lang/src/cuda/lang/_stub/nvvm.py,
     experimental/cuda-lang/src/cuda/lang/_stub/nvvm_mlir_interfaces.py,
     experimental/cuda-lang/src/cuda/lang/_stub/_libdevice.py,

.gitignore

@@ -16,10 +16,10 @@ build/
 .cache
 .idea
 .rgignore
-docs/venv
-docs/build
-docs/source/generated
-docs/source/stubs
+**/docs/venv
+**/docs/build
+**/docs/source/generated
+**/docs/source/stubs
 *.benchmarks
 .vscode/
 /internal

experimental/cuda-lang/docs/Makefile

@@ -0,0 +1,37 @@
+# SPDX-FileCopyrightText: Copyright (c) <2026> NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+# You can set these variables from the command line, and also
+# from the environment for the first two.
+SPHINXOPTS      ?= -W
+VENV            ?=
+BINDIR           = $(if $(VENV),$(VENV)/bin/,)
+SPHINXBUILD     ?= $(BINDIR)sphinx-build
+SPHINXAUTOBUILD ?= $(BINDIR)sphinx-autobuild
+PYTHON          ?= $(BINDIR)python
+SOURCEDIR        = source
+BUILDDIR         = build
+PROJECTDIR       = $(CURDIR)/..
+AUTOBUILD_OPTS   = --watch $(PROJECTDIR)/src/cuda/lang --host 0.0.0.0 --port 8000
+
+# Put it first so that "make" without argument is like "make help".
+help:
+	@$(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
+
+.PHONY: help Makefile clean
+
+clean:
+	rm -rf $(SOURCEDIR)/generated
+	rm -rf $(BUILDDIR)
+
+serve: html
+	$(PYTHON) -m http.server -d "$(BUILDDIR)/html"
+
+watch:
+	$(SPHINXAUTOBUILD) $(AUTOBUILD_OPTS) "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
+
+# Catch-all target: route all unknown targets to Sphinx using the new
+# "make mode" option. $(O) is meant as a shortcut for $(SPHINXOPTS).
+%: Makefile
+	$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O) --show-traceback