feat: basic CI (#1)

base blocks for the CI

.github/workflows/ci.yaml

@@ -0,0 +1,29 @@
+name: CI
+on:
+  pull_request:
+    paths:
+      - .github/workflows/ci.yaml
+      - .sbtopts
+      - build.sbt
+      - .scalafmt.conf
+      - project/**
+      - src/**
+
+defaults:
+  run:
+    shell: bash
+
+env:
+  GITHUB_TOKEN: ${{ secrets.READ_PACKAGES }}
+
+jobs:
+  code-check:
+    runs-on: self-hosted
+    steps:
+      - uses: actions/checkout@v4
+      - run: sbt headerCheckAll
+  test:
+    runs-on: self-hosted
+    steps:
+      - uses: actions/checkout@v4
+      - run: sbt test