Welcome to Hypermod (#9897)

Welcome to Hypermod! 🚀

This PR introduces the Hypermod Workflow File which connects the
repository to Hypermod.
The workflow will be triggered by Hypermod when a deployment is
requested, which then uses Hypermod CLI to apply automated code
transformations to your source files.
After the transformations is complete, diffs are collected and a pull
request is created.

Please review the changes and merge this PR to connect.

For more information, visit
[Hypermod](https://hypermod.io/docs/installation).

Co-authored-by: Christopher Kolstad <chriswk@fastmail.com>

.github/workflows/hypermod.yml

@@ -0,0 +1,22 @@
+name: Hypermod
+
+on:
+  workflow_dispatch:
+    inputs:
+      deploymentId:
+        description: "The deployment ID contianing instructions to apply on a repository"
+      deploymentKey:
+        description: "The deployment key to authenticate the request"
+jobs:
+  receive_hypermod_event:
+    permissions: write-all
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Run Hypermod CLI
+        uses: hypermod-io/action@v1
+        with:
+          deploymentId: ${{ inputs.deploymentId }}
+          deploymentKey: ${{ inputs.deploymentKey }}
+    env:
+      GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}