chore: Set up CI workflow, PR title checker, and added pull request t…

…emplate

.github/actions/prepare/action.yml

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+name: 'Prepare: Install'
+description: 'Prepares the repo by installing dependencies'
+
+runs:
+  using: 'composite'
+  steps:
+    - name: echo github.ref
+      shell: bash
+      run: echo ${{ github.ref }}
+
+    - name: Setup Node.js
+      uses: actions/setup-node@v4
+      with:
+        node-version: 20
+        registry-url: 'https://registry.npmjs.org'
+
+    - name: Install dependencies
+      shell: bash
+      run: npm ci

.github/pull_request_template.md

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+## 개요
+
+### 세부 내용
+
+### 관련 링크

.github/workflows/ci.yml

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+name: CI
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - '**'
+
+concurrency:
+  group: '${{ github.workflow }} - ${{ github.head_ref || github.ref }}'
+  cancel-in-progress: true
+
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ./.github/actions/prepare
+      - name: Build
+        run: npm run build
+  lint:
+    name: Lint
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ./.github/actions/prepare
+      - name: Lint
+        run: npm run check:lint
+  spell:
+    name: Spell
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ./.github/actions/prepare
+      - name: Spell
+        run: npm run check:spell
+  format:
+    name: Format
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ./.github/actions/prepare
+      - name: Install
+        run: npm run check:format

.github/workflows/pr-title-checker.yml

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+name: Conventional PR Title Checker
+
+on:
+  pull_request:
+    types:
+      - opened
+      - edited
+      - synchronize
+
+permissions:
+  pull-requests: read
+
+jobs:
+  main:
+    name: Validate PR title
+    runs-on: ubuntu-latest
+    steps:
+      - uses: amannn/action-semantic-pull-request@v5
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          types: |
+            docs
+            feat
+            fix
+            test
+            chore
+            ci
+            refactor
+          requireScope: false
+          subjectPattern: ^[a-z].+[^\.]$
+          subjectPatternError: |
+            The "subject" must start with a lower-case letter and must not
+            end with a full-stop.