Enable fast mode (#157)

This has two effects: making the build faster, as quarto render currently
uses a slow Lua JSON parser to deserialize objects.json on every page
render; and generating an objects.txt file, which can be used by sphinx
so that downstream projects can interlink with us.

_quarto.yml

@@ -40,6 +40,7 @@ filters:
   - interlinks
 
 interlinks:
+  fast: true
   sources:
     python:
       url: https://docs.python.org/3/