Add mermaid to docs (#5405)

* move devcontainer docs

* rename bare metal pages

* fix backlinks

* Add getting started for devs

* add mermaid

* include contrib in docs

* use another plugin

* include everything

* update doc checks

* fix install command

* Update mkdocs.yml

* Update mkdocs.yml

* Update starting.md

* Update starting.md

* Update starting.md

* extend requirements

* Update mkdocs.yml

* clean diff

* clean diff + check if it works

* fix CI check for custom tags

* clean md

.github/workflows/qc_checks.yaml

@@ -105,6 +105,7 @@ jobs:
       - name: Check Config
         run: |
           pip install pyyaml
+          pip install -r docs/requirements.txt
           python docs/ci/check_mkdocs_config.py
       - name: Check Links
         run: |