feat: add manual trigger to github actions

.github/workflows/go.yml

@@ -1,15 +1,16 @@
-# Only trigger when a PR is committed.
+# Only trigger when a PR is committed or manually.
 name: Linux Build All Arches
 #on: [pull_request]
 on:
   pull_request:
     types: [closed]
     branches:
       - master
+  workflow_dispatch:
 
 jobs:
   build:
-    if: github.event.pull_request.merged
+    if: github.event.pull_request.merged || github.event_name == 'workflow_dispatch'
     name: Build
     # We used to build on ubuntu-18.04 but that is now deprecated by
     # GitHub. Earlier distributions will have to use the musl build.

.github/workflows/musl.yaml

@@ -3,11 +3,12 @@ name: Linux Build Musl Static
 on:
   pull_request:
     types: [closed]
+  workflow_dispatch:
 
 jobs:
   build:
-    # Only trigger when a PR is committed.
-    if: github.event.pull_request.merged
+    # Only trigger when a PR is committed or manually triggered.
+    if: github.event.pull_request.merged || github.event_name == 'workflow_dispatch'
     name: Build
     runs-on: ubuntu-latest
     steps:

.github/workflows/windows.yml

@@ -1,5 +1,7 @@
 name: Windows Test
-on: [pull_request]
+on:
+  pull_request:
+  workflow_dispatch:
 
 jobs:
   build: