ci: create release workflow

.github/workflows/main.yml

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+# This is a basic workflow to help you get started with Actions
+
+name: CI
+
+# Controls when the action will run. 
+on:
+  # Triggers the workflow on push or pull request events but only for the master branch
+  push:
+    paths: 
+      - 'EFI/**' 
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  # This workflow contains a single job called "build"
+  build:
+    # The type of runner that the job will run on
+    runs-on: ubuntu-latest
+
+    # Steps represent a sequence of tasks that will be executed as part of the job
+    steps:
+      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+      - uses: actions/checkout@v2
+
+      - name: Manage Version
+        run: |
+          git fetch --prune --unshallow --tags
+          GIT_SHA="$(git rev-parse --short HEAD)"
+          CUR_TAG="$(git tag -l | grep 'pre-release' | tail -1)"
+          echo "SHORT_SHA=$GIT_SHA" >> $GITHUB_ENV
+          if [[ -z $CUR_TAG ]]; then
+            echo "OLD_PRE_TAG=NULL" >> $GITHUB_ENV
+          else
+            echo "OLD_PRE_TAG=$CUR_TAG" >> $GITHUB_ENV
+          fi
+      # Runs a single command using the runners shell
+      - name: Zip EFI folder
+        run: zip -r EFI.zip EFI
+
+      - name: Generate Prerelease Release Notes
+        run: |
+          echo '### Disclaimer:' >> ReleaseNotes.md
+          echo 'This version is auto-created by Github Action.' >> ReleaseNotes.md
+          echo 'It is not ready for daily use and I do not guarantee its usability.' >> ReleaseNotes.md
+          echo '### The latest five updates are:' >> ReleaseNotes.md
+          git log -"5" --format="- %H %s" | sed '/^$/d' >> ReleaseNotes.md
+          
+      - name: Delete Old Prerelease
+        uses: dev-drprasad/delete-tag-and-release@v0.1.2
+        with:
+          tag_name: ${{ env.OLD_PRE_TAG }}
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Publish GitHub Release
+        uses: ncipollo/release-action@v1
+        with:
+          prerelease: true
+          bodyFile: ReleaseNotes.md
+          artifacts: "EFI.zip"
+          name: "EFI Pre-release"
+          tag: "pre-release"
+          token: ${{ secrets.GITHUB_TOKEN }}