ci: add regenerate workflow to CI

.github/workflows/generate.yaml → .github/workflows/__generate.yaml

@@ -1,13 +1,7 @@
 name: Generate SDK
 
 on:
-  pull_request:
-    paths:
-      - .speakeasy/gen.yaml
-    types:
-    - opened
-    - synchronize
-    - reopened
+  workflow_dispatch:
 
 jobs:
   generate:

.github/workflows/generate_on_label.yaml

@@ -0,0 +1,26 @@
+name: Generate SDK
+
+on:
+  pull_request:
+    branches:
+      - '*'
+    types:
+    - labeled
+
+jobs:
+  check-label:
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+      pull-requests: write
+    steps:
+      - uses: mheap/github-action-required-labels@v5
+        with:
+          mode: exactly
+          count: 1
+          labels: "regenerate"
+
+  generate:
+    needs:
+    - check-label
+    uses: ./.github/workflows/__generate.yaml

.github/workflows/generate_on_pr.yaml

@@ -0,0 +1,14 @@
+name: Generate SDK
+
+on:
+  pull_request:
+    paths:
+      - .speakeasy/gen.yaml
+    types:
+    - opened
+    - synchronize
+
+jobs:
+  build:
+    uses: ./.github/workflows/__generate.yaml
+