[CI.yaml] Add bun.

Author: lgarron

.github/workflows/CI.yaml

@@ -8,6 +8,9 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
+      - uses: oven-sh/setup-bun@v2
+        with:
+          bun-version: "latest"
       - uses: actions/setup-node@v4
         with:
           node-version: 22