fix: add Dependabot npm monitoring with conventional commit prefixes

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: butler54

.github/dependabot.yml

@@ -6,4 +6,17 @@ updates:
     directory: "/"
     schedule:
       interval: "weekly"
+    commit-message:
+      prefix: "ci"
+      include: "scope"
+
+  # Check for updates to npm dependencies every week
+  - package-ecosystem: "npm"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    commit-message:
+      prefix: "fix"
+      prefix-development: "chore"
+      include: "scope"