chore: publish docs (#68)

We use [mike](https://github.com/jimporter/mike). We get the version
from `pyproject.toml`.

These docs are currently deployed to
https://nasa-impact.github.io/csda-client ... there's a couple manual
steps before automatic deploys will work.

Author: gadomski

.github/workflows/docs.yaml

@@ -0,0 +1,23 @@
+on:
+  push:
+    branches:
+      - main
+
+permissions:
+  contents: write
+
+jobs:
+  docs:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - uses: astral-sh/setup-uv@v5
+      - run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+      - id: version
+        run: echo "version=$(grep '^version' pyproject.toml | sed 's/version = "\(.*\)"/\1/')" >> "$GITHUB_OUTPUT"
+      - run: uv run mike deploy --push --update-aliases ${{ steps.version.outputs.version }} latest

pyproject.toml

@@ -29,6 +29,7 @@ docs = [
     "rasterio>=1.4.3",
     "contextily>=1.6.2",
     "json-schema-for-humans>=1.4.1",
+    "mike>=2.1.3",
     "mkdocs-material>=9.6.18",
     "mkdocs-jupyter>=0.25.1",
     "mkdocstrings[python]>=0.30.0",