Skip UAT/PRD deploys for changes that don't touch the deployable

Docs, local release tooling (tools/), and the GDScript test suite
(never executed by this pipeline, and irrelevant to the API image,
the exported web build, or k8s manifests) don't need a full deploy.
workflow_dispatch still allows a manual run for any of these if ever
needed.

.gitea/workflows/deploy-prd.yml

@@ -4,6 +4,10 @@ on:
   push:
     branches:
       - production
+    paths-ignore:
+      - '**.md'
+      - 'tools/**'
+      - 'tests/**'
   workflow_dispatch: {}
 
 concurrency:

.gitea/workflows/deploy-uat.yml

@@ -4,6 +4,10 @@ on:
   push:
     branches:
       - main
+    paths-ignore:
+      - '**.md'
+      - 'tools/**'
+      - 'tests/**'
   workflow_dispatch: {}
 
 concurrency: