move options to separate modules, set up mkDocs generation

.github/workflows/docs.yml

@@ -0,0 +1,16 @@
+name: Build docs with nix and Material for mkDocs
+on:
+    push:
+
+jobs:
+    build-docs:
+        runs-on: ubuntu-latest
+        steps:
+            - uses: actions/checkout@v4
+            - name: Nix action dependencies
+              run: |
+                apt update -y
+                apt install sudo -y 
+            - uses: cachix/install-nix-action@v27
+            - name: Build package from flake
+              run: nix build .#docs