Set up grouped Dependabot updates (#3401)

* Set up grouped Dependabot updates for npm dependencies

* Correctly use "devDependencies" group in package.json

There were quite a few dependencies that should have been added to "devDependencies" in the first place. Changing this now so we can configure Dependabot to update all dev dependencies in a single PR.

.github/dependabot.yml

@@ -6,30 +6,49 @@ updates:
       interval: monthly
     open-pull-requests-limit: 99
     target-branch: develop
+
   - package-ecosystem: npm
     directory: "/ui"
     schedule:
       interval: monthly
     open-pull-requests-limit: 99
     target-branch: develop
+    groups:
+      dev:
+        dependency-type: "development"
+        exclude-patterns:
+          # We want to maintain control over which type updates we merge to make
+          # sure they are in sync with the respective package
+          - "@types/*"
+      i18n:
+        patterns:
+          - "@format-js/*"
+          - "react-intl"
+      blueprint:
+        patterns:
+          - "@blueprintjs/*"
+
   - package-ecosystem: docker
     directory: "/"
     schedule:
       interval: monthly
     open-pull-requests-limit: 99
     target-branch: develop
+
   - package-ecosystem: docker
     directory: "/ui"
     schedule:
       interval: monthly
     open-pull-requests-limit: 99
     target-branch: develop
+
   - package-ecosystem: docker
     directory: "/e2e"
     schedule:
       interval: monthly
     open-pull-requests-limit: 99
     target-branch: develop
+
   - package-ecosystem: github-actions
     directory: "/"
     schedule: