update mkdocs config

- use git-revision-date-localized with enabled creation date
- update requirements-mkdocs.txt and pin verisons
- add requirements
- add dev addr
- fix template
- use better icons for repo and edit button
- remove odd extension

docs/index.md

@@ -7,7 +7,7 @@ title: Home
 
   ```bash
   pip install -r requirements-mkdocs.txt
-  mkdocs serve -a localhost:8080
+  mkdocs serve
   ```
 -->
 <div align="center" markdown="1">