GitHub CI: Add monkey short-internet test

.github/workflows/monkey-test.yaml

@@ -0,0 +1,62 @@
+name: "Monkey Test"
+
+on: [pull_request]
+
+jobs:
+  test:
+    name: '${{ matrix.test }}'
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        test:
+          - short-internet
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v3
+      with:
+        fetch-depth: 1
+
+    - name: apt-get install packages
+      run: sudo apt-get update -qq &&
+           sudo apt-get install --no-install-recommends -y
+               bison
+               build-essential
+               check
+               clang
+               flex
+               git
+               gperf
+               libcurl4-openssl-dev
+               libgtk-3-dev
+               libhtml-parser-perl
+               libjpeg-dev
+               libpng-dev
+               librsvg2-dev
+               llvm
+               pkg-config
+               wbritish # Needed for `/usr/share/dict/words`, used by test
+
+    - name: Build and install project libs
+      run: |
+          export TARGET_WORKSPACE="$(pwd)/projects"
+          source docs/env.sh
+          ns-clone -n -s
+          ns-make-tools install
+          ns-make-libs install
+
+    - name: Disable -Werror
+      # We can remove this step if we ever move to GitHub properly.
+      run: |
+          find . -type f -name Makefile | xargs sed -i 's/-Werror//'
+
+    - name: Build NetSurf Monkey
+      run: |
+          export TARGET_WORKSPACE="$(pwd)/projects"
+          source docs/env.sh
+          make -j"$(nproc)" TARGET=monkey
+
+    - name: Run Monkey Test
+      run: |
+          LC_ALL=C.UTF-8 test/monkey-see-monkey-do -v -d ${{ matrix.test }}