ci: add image compression workflow (#35)

* ci: add image compression workflow

* Optimised images with calibre/image-actions

Author: serkonda7

.github/workflows/image-actions.yml

@@ -0,0 +1,19 @@
+name: Compress Images
+
+on:
+  pull_request:
+    paths:
+      - '**.png'
+
+jobs:
+  compress:
+    # Only run on Pull Requests within the same repository, and not from forks.
+    if: github.event.pull_request.head.repo.full_name == github.repository
+    name: calibreapp/image-actions
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Compress Images
+        uses: calibreapp/image-actions@main
+        with:
+          githubToken: ${{ secrets.GITHUB_TOKEN }}

README.md

@@ -10,7 +10,7 @@ The only feature until now is syntax highlighting.
 Launch the command palette (`ctrl+P`) and run `ext install serkonda7.vscode-vba`.
 
 ## Contributing
-Any contributions like bug reports, code, tests or documentation are appreciated!
+Any contributions are highly appreciated!
 For details see [CONTRIBUTING.md](CONTRIBUTING.md).
 
 ## License