Add spec and generation workflow

Author: Majored

.github/workflows/trigger-wrappers.yml

@@ -0,0 +1,18 @@
+name: Wrapper generation
+
+on:
+  push:
+    branches: [main]
+    paths: ['spec.yaml']
+  workflow_dispatch:
+
+jobs:
+  trigger-wrappers:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Trigger PHP Wrapper
+        uses: peter-evans/repository-dispatch@v2
+        with:
+          token: ${{ secrets.DISPATCH_TOKEN }}
+          repository: BuiltByBit/api-wrapper-codegen-php
+          event-type: spec-updated