Fix settings reference in runtime docs

.readthedocs.yaml

@@ -13,10 +13,11 @@ sphinx:
 formats:
   - pdf
 
-# Optionally set the version of Python and requirements required to build your docs
+# Optionally set the version of Python and requirements required to build your
+# docs
 python:
   version: 3.8
   install:
-    - method: pip
-      path: .
     - requirements: docs/requirements.txt
+    - requirements: requirements/rtd.txt
+    - requirements: runtimes/alibi-detect/requirements/dev.txt

docs/Makefile

@@ -23,5 +23,4 @@ start:
 	sphinx-autobuild . ./_build/html
 
 install-dev:
-	pip install -e ../
 	pip install -r ./requirements.txt

requirements/rtd.txt

@@ -0,0 +1,14 @@
+# NOTE: This requirements.txt file is required to set up our RTD environment.
+# Therefore, it follows a couple weird conventions that are required by RTD
+# which also make it hard to use locally (thus why it's split in two
+# requirements.txt files).
+# For example, it must be called from the top-level folder to # align with how
+# RTD works (except for `-r` lines, which get converted to relative on-the-fly
+# by RTD).
+
+.
+# NOTE: Both the Alibi-Detect and Huggingface runtimes show a generated
+# reference of the available settings - therefore, they need to be
+# available on the environment.
+./runtimes/alibi-detect
+./runtimes/huggingface