refact: move requirements.txt into ./docs folder

Author: boriel

.readthedocs.yaml

@@ -13,7 +13,7 @@ build:
 
 python:
   install:
-    - requirements: ./requirements.txt
+    - requirements: ./docs/requirements.txt
 
 # Build documentation in the docs/ directory with mkdocs
 mkdocs:

requirements.txt docs/requirements.txtrequirements.txt renamed to docs/requirements.txt

@@ -1,3 +1,5 @@
+# This file is used to build the documents, not the project.
+
 babel==2.16.0
 certifi==2024.8.30
 charset-normalizer==3.4.0