feat: add dependency update checking

Signed-off-by: thaddeus kuah <[email protected]>

.github/dependabot.yml

@@ -0,0 +1,6 @@
+version: 2
+updates:
+  - package-ecosystem: "bun" # See documentation for possible values
+    directory: "/" # Location of package manifests
+    schedule:
+      interval: "daily"