ci: centralize ci-bun.yml (#563)

* ci: centralize `ci-bun.yml`

* wip

* Update CI workflow reference to main branch

Author: lumirlumir

.github/workflows/bun-test.yml

@@ -0,0 +1,14 @@
+name: ci-bun
+
+on:
+    push:
+        branches:
+            - main
+
+    pull_request:
+        branches:
+            - main
+
+jobs:
+    ci-bun:
+        uses: eslint/workflows/.github/workflows/ci-bun.yml@main