feat: configure Dependabot to group dependency updates (#1210)

* feat: configure Dependabot to group dependency updates

Add Dependabot configuration to group related dependency updates into
single PRs instead of creating individual PRs for each dependency.

Grouping strategy:
- Root workspace: prod vs dev dependencies
- Example apps: all dependencies grouped per app
- E2E apps: all dependencies grouped per app
- Ruby/Bundler: all gems grouped per app

Benefits:
- Reduces PR noise (25 individual PRs → ~6-8 grouped PRs)
- Easier to review and merge related updates together
- Fewer CI runs and merge conflicts
- Weekly schedule instead of immediate updates

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

* style: fix formatting in dependabot.yml

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: abueide

.github/dependabot.yml

@@ -0,0 +1,85 @@
+version: 2
+updates:
+  # Root workspace
+  - package-ecosystem: 'npm'
+    directory: '/'
+    schedule:
+      interval: 'weekly'
+    groups:
+      production-dependencies:
+        patterns:
+          - '*'
+        exclude-patterns:
+          - '*-dev'
+          - '*-test'
+      development-dependencies:
+        patterns:
+          - '*-dev'
+          - '*-test'
+
+  # Example app
+  - package-ecosystem: 'npm'
+    directory: '/examples/AnalyticsReactNativeExample'
+    schedule:
+      interval: 'weekly'
+    groups:
+      example-dependencies:
+        patterns:
+          - '*'
+
+  # E2E apps
+  - package-ecosystem: 'npm'
+    directory: '/examples/E2E-compat'
+    schedule:
+      interval: 'weekly'
+    groups:
+      e2e-dependencies:
+        patterns:
+          - '*'
+
+  - package-ecosystem: 'npm'
+    directory: '/examples/E2E-latest'
+    schedule:
+      interval: 'weekly'
+    groups:
+      e2e-dependencies:
+        patterns:
+          - '*'
+
+  # E2E CLI
+  - package-ecosystem: 'npm'
+    directory: '/e2e-cli'
+    schedule:
+      interval: 'weekly'
+    groups:
+      e2e-cli-dependencies:
+        patterns:
+          - '*'
+
+  # Bundler (Ruby dependencies)
+  - package-ecosystem: 'bundler'
+    directory: '/examples/E2E-compat'
+    schedule:
+      interval: 'weekly'
+    groups:
+      ruby-dependencies:
+        patterns:
+          - '*'
+
+  - package-ecosystem: 'bundler'
+    directory: '/examples/E2E-latest'
+    schedule:
+      interval: 'weekly'
+    groups:
+      ruby-dependencies:
+        patterns:
+          - '*'
+
+  - package-ecosystem: 'bundler'
+    directory: '/examples/AnalyticsReactNativeExample'
+    schedule:
+      interval: 'weekly'
+    groups:
+      ruby-dependencies:
+        patterns:
+          - '*'