Update conf with extension details

conf.py

@@ -1,16 +1,24 @@
 """Configuration for building PEPs using Sphinx."""
 
+import sys
+from pathlib import Path
+
+sys.path.append(str(Path("pep_sphinx_extensions").absolute()))
+
 # -- Project information -----------------------------------------------------
 
 project = "PEPs"
 master_doc = "contents"
 
 # -- General configuration ---------------------------------------------------
 
+# Add any Sphinx extension module names here, as strings.
+extensions = ["pep_sphinx_extensions"]
+
 # The file extensions of source files. Sphinx uses these suffixes as sources.
 source_suffix = {
-    ".rst": "restructuredtext",
-    ".txt": "restructuredtext",
+    ".rst": "pep",
+    ".txt": "pep",
 }
 
 # List of patterns (relative to source dir) to ignore when looking for source files.
@@ -32,6 +40,7 @@
 # -- Options for HTML output -------------------------------------------------
 
 # HTML output settings
+html_math_renderer = "maths_to_html"  # Maths rendering
 html_show_copyright = False  # Turn off miscellany
 html_show_sphinx = False
 html_title = "peps.python.org"  # Set <title/>