add node/bun tests for core

.github/workflows/core.yml

@@ -0,0 +1,35 @@
+name: "Handle @arpc-packages/core checks"
+
+on:
+    push:
+        paths:
+            - "packages/arpc-core/**"
+            - ".github/workflows/core.yml"
+
+jobs:
+    node-test:
+        name: "Run node tests (Node ${{ matrix.node-version }})"
+        runs-on: ubuntu-22.04
+        strategy:
+            matrix:
+                node-version: [18, 19, 20, 22, 23, 24]
+        steps:
+            - uses: actions/checkout@v4
+            - uses: actions/setup-node@v4
+              with:
+                node-version: ${{ matrix.node-version }}
+            - run: npm ci
+              working-directory: ./packages/arpc-core
+            - run: npm run test
+              working-directory: ./packages/arpc-core
+
+    bun-test:
+        name: "Run bun tests"
+        runs-on: ubuntu-22.04
+        steps:
+            - uses: actions/checkout@v4
+            - uses: oven-sh/setup-bun@v2
+            - run: npm ci
+              working-directory: ./packages/arpc-core
+            - run: bun test
+              working-directory: ./packages/arpc-core