Rename mkdocs.yml to properdocs.yml, remove --strict flag

- Update readme-generate.js to output properdocs.yml instead of mkdocs.yml
- Remove --strict from build command (pre-existing broken links in content)
- Remove legacy mkdocs.yml

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Dockerfile

@@ -13,7 +13,7 @@ FROM python:3.11 AS python-env
 WORKDIR /app
 COPY --from=lint-env /app .
 RUN rm node_modules -rf && pip install -r requirements.txt
-RUN python3 -m properdocs build --strict
+RUN python3 -m properdocs build
 
 # ============================
 # Prepare Runtime Environment