Github Actions: Added CI for running tests on README.md snippets

Signed-off-by: Grzegorz Latosinski <glatosinski@antmicro.com>

.github/workflows/test.yml

@@ -0,0 +1,35 @@
+name: Sargraph tests
+
+on:
+    push:
+        branches: [main]
+    pull_request:
+        branches: [main]
+
+jobs:
+    readme-tests:
+        runs-on: ubuntu-latest
+        container:
+            image: debian:bullseye
+        steps:
+            - name: Checkout sources
+              uses: actions/checkout@v3
+            - name: Install dependencies
+              run: |
+                  apt-get update
+                  apt-get install -qqy --no-install-recommends python3 python3-pip git
+                  pip3 install git+https://github.com/antmicro/tuttest.git
+            - name: Run README.md snippets
+              run: |
+                  ./scripts/test.sh
+            - name: Upload artifacts
+              uses: actions/upload-artifact@v3
+              with:
+                  name: sargraph-sample-graphs
+                  path: |
+                      *.svg
+                      *.png
+                      *.ascii
+                      *.html
+                      *.txt
+                      *.log