Group dev dependencies, keep production deps as separate PRs

- Dev dependencies grouped into single PR via dependency-type: development
- Production dependencies get individual PRs for selective updates
- Reduced github-actions and gitsubmodule limits to 1 (catch-all groups)

Author: corpo-iwillspeak

.github/dependabot.yml

@@ -14,7 +14,7 @@ updates:
     directory: "/"
     schedule:
       interval: "weekly"
-    open-pull-requests-limit: 10
+    open-pull-requests-limit: 1
     groups:
       github-actions:
         patterns:
@@ -23,7 +23,7 @@ updates:
     directory: "/"
     schedule:
       interval: "weekly"
-    open-pull-requests-limit: 10
+    open-pull-requests-limit: 1
     groups:
       gitsubmodules:
         patterns: