Create an action to sleep on any platform

Signed-off-by: Peter Nied <petern@amazon.com>

README.md

@@ -1,2 +1,20 @@
 # action-sleep
-Platform independent GitHub Action to Sleep
+GitHub Action to Sleep that works on a multi-platform runners
+
+Thanks to https://github.com/jakejarvis/wait-action for inspiring this action
+
+```yaml
+inputs:
+  seconds:
+    description: 'The number of seconds to sleep'
+    required: true
+```
+
+## Usage:
+
+```yaml
+steps:
+- uses: peternied/action-sleep@v1
+  with:
+    seconds: 30
+```

action.yml

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+name: 'Sleep'
+
+description: 'Sleeps for an amount of seconds'
+
+inputs:
+  seconds:
+    description: 'The number of seconds to sleep'
+    required: true
+
+runs:
+  using: "composite"
+  steps:
+
+    - name: Sleep (for Non-Windows)
+      if: ${{ runner.os != 'Windows'}}
+      run: sleep ${{ inputs.seconds }}s
+      shell: bash
+
+    - name: Sleep (for Windows)
+      if: ${{ runner.os == 'Windows'}}
+      run: Start-Sleep -s ${{ inputs.seconds }}
+      shell: pwsh