added action

README.md

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+# Checkout GitHub Action
+
+This composite GitHub Action allows you to **clone** and **check out** the current repository using the Git CLI. The action uses the GitHub-provided `GITHUB_TOKEN` for authentication, ensuring secure and seamless access.
+
+## Features
+
+- Clones the repository using HTTP.
+- Checks out the specified branch or reference (`${{ github.ref }}`).
+- Utilizes GitHub's built-in secrets for secure access.
+
+## Usage
+
+### Example Workflow
+
+```yaml
+name: Example Workflow
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  checkout-job:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Repository
+        uses: ./
+```
+
+### Inputs
+
+No custom inputs are required. The action uses environment variables provided by GitHub Actions:
+
+| Variable           | Description                                               |
+|--------------------|-----------------------------------------------------------|
+| `github.server_url` | The URL of the GitHub server.                             |
+| `github.token`      | Automatically provided GitHub token for authentication.  |
+| `github.repository` | The repository name (`owner/repo`).                      |
+| `github.workspace`  | The working directory for the workflow.                  |
+| `github.ref`        | The branch or tag to check out.                          |

action.yml

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+name: 'Checkout'
+description: 'Checkout the current repository'
+runs:
+  using: "composite"
+  steps:
+    - name: Clone Repository
+      shell: sh
+      run: |
+        URL_WITH_HTTP=${{ github.server_url }}
+        URL=${URL_WITH_HTTP#http://}
+        URL=${URL#https://}
+        git clone http://wf:${{ github.token }}@${URL}/${{ github.repository }}.git ${{ github.workspace }}
+    - name: Checkout Repository
+      shell: sh
+      run: |
+        cd ${{ github.workspace }}
+        git checkout ${{ github.ref }}