add mkdocs requirements

doc/requirements.txt

@@ -0,0 +1,43 @@
+Babel==2.15.0
+beautifulsoup4==4.12.3
+certifi==2024.6.2
+charset-normalizer==3.3.2
+click==8.1.7
+colorama==0.4.6
+EditorConfig==0.12.4
+ghp-import==2.1.0
+gitdb==4.0.11
+GitPython==3.1.42
+idna==3.7
+Jinja2==3.1.3
+Markdown==3.5.2
+MarkupSafe==2.1.5
+mdsplit==0.4.2
+mergedeep==1.3.4
+mkdocs==1.6.0
+mkdocs-custommill==1.3.0
+mkdocs-get-deps==0.2.0
+mkdocs-git-revision-date-plugin==0.3.2
+mkdocs-material==9.5.28
+mkdocs-material-extensions==1.3.1
+mkdocs-risonia-theme==0.1.12
+mkdocs-terminal==4.4.0
+mkdocs-windmill==1.0.5
+natsort==8.4.0
+packaging==23.2
+paginate==0.5.6
+pathspec==0.12.1
+platformdirs==4.2.0
+Pygments==2.17.2
+pymdown-extensions==10.7
+python-dateutil==2.8.2
+PyYAML==6.0.1
+pyyaml_env_tag==0.1
+regex==2023.12.25
+requests==2.32.3
+six==1.16.0
+smmap==5.0.1
+soupsieve==2.5
+termcolor==2.4.0
+urllib3==2.2.1
+watchdog==4.0.0