Create release workflow and add publish docs steps (#17)

Create a release workflow and add publish docs steps.

The workflow follows the mkdocs recommendation for the setup
([here](https://squidfunk.github.io/mkdocs-material/publishing-your-site/#with-github-actions)
and [here](https://www.mkdocs.org/user-guide/deploying-your-docs/)).

.github/workflows/release.yml

@@ -0,0 +1,26 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - "*"
+
+jobs:
+  release:
+    name: release
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up PDM
+        uses: pdm-project/setup-pdm@v4
+        with:
+          python-version: "3.10"
+      - name: Install dependencies
+        run: |
+          pdm sync -G docs
+      - name: Deploy docs
+        run: |
+          pdm run mkdocs gh-deploy --force

docs/CNAME

@@ -0,0 +1 @@
+dbt-score.picnic.tech