Move docs to cli repo

.github/workflows/docs.yml

@@ -0,0 +1,32 @@
+name: github pages
+
+on:
+  push:
+    paths:
+      - docs/**
+      - .github/workflows/docs.yml
+    branches:
+      - master
+
+jobs:
+  build-deploy:
+    runs-on: ubuntu-latest
+    environment: docs
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Setup mdBook
+        uses: peaceiris/actions-mdbook@v1
+        with:
+          mdbook-version: "0.4.10"
+
+      - name: Build
+        run: cd docs && md build -d ../build
+
+      - name: Deploy 🚀
+        uses: JamesIves/github-pages-deploy-action@v4.2.3
+        with:
+          branch: gh-pages # The branch the action should deploy to.
+          folder: build # The folder the action should deploy.
+          clean: false
+          token: ${{ secrets.DEPLOY_KEY }} # let's pretend I don't need it for now