add Action 'with-post-step'

with-post-step/action.yml

@@ -0,0 +1,17 @@
+name: With post step
+description: 'Generic JS Action to execute a main command and set a command as a post step.'
+inputs:
+  main:
+    description: 'Main command/script.'
+    required: true
+  post:
+    description: 'Post command/script.'
+    required: true
+  key:
+    description: 'Name of the state variable used to detect the post step.'
+    required: false
+    default: POST
+runs:
+  using: 'node12'
+  main: 'main.js'
+  post: 'main.js'