Add unit test workflow

w/ extra runs for tracker test

.github/workflows/test.yml

@@ -0,0 +1,23 @@
+name: Test
+
+on:
+  pull_request:
+    branches: '*'
+  push:
+    branches:
+      - main
+
+jobs:
+  test:
+    name: Run unit tests
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v3
+        with:
+          go-version-file: go.mod
+          check-latest: true
+      - name: Run unit tests
+        run: |
+          go test -v -p 1 ./...
+          go test -v ./tracker -count 20