Refactor/#206/structure action

.github/CODEOWNERS

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+* @seueooo @KIMGEONHWI @Ivoryeee @suwonthugger

.github/workflows/auto-assign.yml

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+name: Auto Assign PR Author
+
+on:
+  pull_request:
+    types: [opened]
+
+jobs:
+  auto-assign:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Install GitHub CLI
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y gh
+
+      - name: Auto-assign PR author
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          gh auth setup-git
+          gh pr edit ${{ github.event.pull_request.number }} --add-assignee ${{ github.event.pull_request.user.login }}

.github/workflows/gpt-review.yml

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+name: Code Review
+
+permissions:
+  contents: read
+  pull-requests: write
+
+on:
+  pull_request:
+    types: [opened, reopened, synchronize]
+
+jobs:
+  test:
+    # if: ${{ contains(github.event.*.labels.*.name, 'gpt review') }} # Optional; to run only when a label is attached
+    runs-on: ubuntu-latest
+    steps:
+      - uses: anc95/ChatGPT-CodeReview@main
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
+          # Optional
+          LANGUAGE: Korean
+          # OPENAI_API_ENDPOINT: https://api.openai.com/v1
+          # MODEL:  # https://platform.openai.com/docs/models
+          # top_p: 1 # https://platform.openai.com/docs/api-reference/chat/create#chat/create-top_p
+          # temperature: 1 # https://platform.openai.com/docs/api-reference/chat/create#chat/create-temperature
+          # max_tokens: 10000
+          # MAX_PATCH_LENGTH: 10000 # if the patch/diff length is large than MAX_PATCH_LENGTH, will be ignored and won't review. By default, with no MAX_PATCH_LENGTH set, there is also no limit for the patch/diff length.