Added GitHub CI workflow for mdBook

.github/workflows/ci.yml

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+name: CI
+on: [push, pull_request]
+
+jobs:
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@master
+      - name: Install Rust
+        run: |
+          rustup set profile minimal
+          rustup toolchain install stable
+          rustup default stable
+      - name: Install mdbook
+        run: |
+          mkdir bin
+          curl -sSL https://github.com/rust-lang/mdBook/releases/download/v0.4.14/mdbook-v0.4.14-x86_64-unknown-linux-gnu.tar.gz | tar -xz --directory=bin
+          echo "$(pwd)/bin" >> $GITHUB_PATH
+      - name: Run tests
+        run: mdbook test

.github/workflows/deploy.yml

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+name: Deploy
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+      - name: Install mdbook
+        run: |
+          mkdir mdbook
+          curl -sSL https://github.com/rust-lang/mdBook/releases/download/v0.4.14/mdbook-v0.4.14-x86_64-unknown-linux-gnu.tar.gz | tar -xz --directory=./mdbook
+          echo `pwd`/mdbook >> $GITHUB_PATH
+      - name: Deploy GitHub Pages
+        run: |
+          # This assumes your book is in the root of your repository.
+          # Just add a `cd` here if you need to change to another directory.
+          mdbook build
+          git worktree add gh-pages
+          git config user.name "Deploy from CI"
+          git config user.email ""
+          cd gh-pages
+          # Delete the ref to avoid keeping history.
+          git update-ref -d refs/heads/gh-pages
+          rm -rf *
+          mv ../book/* .
+          git add .
+          git commit -m "Deploy $GITHUB_SHA to gh-pages"
+          git push --force --set-upstream origin gh-pages