add weekly test, update docs reqs

Author: chrishavlin

.github/workflows/weekly-test.yml

@@ -0,0 +1,30 @@
+# weekly test, runs mondays at 2:30AM
+name: weekly_build
+
+on:
+  schedule:
+      - cron: "30  2  *  *  1"
+
+jobs:
+  test:
+    name: ${{ matrix.platform }} py${{ matrix.python-version }}
+    runs-on: ${{ matrix.platform }}
+    strategy:
+      matrix:
+        platform: [ubuntu-latest, windows-latest, macos-latest]
+        python-version: ['3.10']
+
+    steps:
+        - uses: actions/checkout@v3
+        - name: Set up Python ${{ matrix.python-version }}
+          uses: actions/setup-python@v4
+          with:
+            python-version: ${{ matrix.python-version }}
+        - name: Install dependencies
+          run: |
+                python -m pip install --upgrade pip
+                python -m pip install -r requirements_dev.txt
+        - name: Setup yt_xarray
+          run: python -m pip install -e .
+        - name: Run Tests
+          run: pytest -v .

.readthedocs.yaml

@@ -16,3 +16,4 @@ python:
    install:
    - requirements: requirements.txt
    - requirements: requirements_dev.txt
+   - requirements: requirements_docs.txt