ci: switch back to github actions

.github/_workflows/README.md

@@ -1 +0,0 @@
-GitHub Actions is temporary disabled as we are reaching the usage limit as a private repo. Tests have been moved to Netlify pipeline as an workaround. We shall recover this once we open up.

.github/workflows/ci.yml

@@ -7,6 +7,7 @@ on:
   pull_request:
     branches:
       - main
+  workflow_dispatch: {}
 
 jobs:
   ci:
@@ -17,7 +18,7 @@ jobs:
       - run: corepack enable
       - uses: actions/setup-node@v3
         with:
-          node-version: 16
+          node-version: 18
           cache: pnpm
 
       - name: 📦 Install dependencies