workflows manual trigger via dispatch event

.github/workflows/linux.yml

@@ -1,6 +1,7 @@
 name: linux_build
 
 on:
+  workflow_dispatch:
   schedule:
     - cron: '0 0 * * *'
   push:

.github/workflows/macos.yml

@@ -1,6 +1,7 @@
 name: macos_build
 
 on:
+  workflow_dispatch:
   schedule:
     - cron: '0 0 * * *'
   push:

.github/workflows/windows.yml

@@ -1,6 +1,7 @@
 name: windows_build
 
 on:
+  workflow_dispatch:
   schedule:
     - cron: '0 0 * * *'
   push: