chore: add dependabot on dev deps and GHA

Author: JasonWeinzierl

.github/dependabot.yml

@@ -0,0 +1,26 @@
+version: 2
+updates:
+  - package-ecosystem: github-actions
+    directory: "/"
+    schedule:
+      interval: weekly
+
+  - package-ecosystem: npm
+    directory: "/"
+    schedule:
+      interval: weekly
+    allow:
+      dependency-type: development
+    groups:
+      vitest:
+        patterns:
+          - "vitest"
+          - "@vitest/*"
+      typescript-eslint:
+        patterns:
+          - "typescript-eslint"
+          - "@typescript-eslint/*"
+      eslint:
+        patterns:
+          - "eslint"
+          - "@eslint/*"