Added the ability to include drawio diagrams into the sphinx docs. (#107)

.github/workflows/documentation.yaml

@@ -4,6 +4,7 @@ on:
   push:
     branches:
     - main
+    - docs/timeline-etc
   pull_request:
     types: [reopened, opened, synchronize]
 
@@ -12,7 +13,10 @@ jobs:
     name: Build
     runs-on: ubuntu-latest
     steps:
-    - run: sudo apt install pandoc -y
+    - name: Install prio to running the process
+      run: |
+        sudo apt install pandoc snapd -y
+        sudo snap install drawio
     - uses: actions/checkout@v3
     - name: Setup Python
       uses: actions/setup-python@v4