[docs] Add restbuilder builder for single page .rst builds (#53)

docs/source/conf.py

@@ -15,6 +15,7 @@ import subprocess
 project = "sphinx-llms-txt"
 copyright = "Jared Dillard"
 author = "Jared Dillard"
+
 llms_txt_uri_template = "{base_url}{docname}.md"
 llms_txt_code_files = ["+:../../sphinx_llms_txt/*.py"]
 llms_txt_summary = """
@@ -22,6 +23,9 @@ A Sphinx extension that generates a summary llms.txt file,written in Markdown,
 and a single combined documentation llms-full.txt file, written in reStructuredText.
 """
 
+# This doesn't seem to be supported
+# rst_file_suffix = ".html.rst"
+
 # check if the current commit is tagged as a release (vX.Y.Z)
 try:
     GIT_TAG_OUTPUT = subprocess.check_output(["git", "tag", "--points-at", "HEAD"])
@@ -50,6 +54,7 @@ extensions = [
     "sphinx.ext.intersphinx",
     "sphinx_contributors",
     "sphinx_llms_txt",
+    "sphinxcontrib.restbuilder",
 ]
 
 # The language for content autogenerated by Sphinx. Refer to documentation