Feature: Add Workflow for Manual Version Bumps

You should add a GitHub Actions workflow that allows you to **manually trigger version bumps**. This will help you keep your version and changelog consistent in the project.

**Proposed Workflow**
```yaml
name: Version Bump

permissions:
contents: write
pull-requests: write

on:
workflow_dispatch:
inputs:
release_type:
description: 'Select version bump type'
required: true
default: 'patch'
type: choice
options:
- patch
- minor
- major

jobs:
bump:
runs-on: ubuntu-latest
steps:
- name: Checkout
uses: actions/checkout@v5
with:
fetch-depth: 0

- name: Universal Version Bump
uses: taj54/universal-version-bump@v0.8.2
with:
release_type: ${{ inputs.release_type }}
git_tag: false
env:
GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
```

### ✅ Acceptance Criteria

- [ ] You can see the workflow in the **Actions** tab.
- [ ] You can choose bump type (`patch`, `minor`, `major`).
- [ ] The workflow bumps the version .
- [ ] (Optional) You can extend this workflow later to include tagging + release creation.

在 .github/workflows 目錄中查找現有的 GitHub Actions 工作流。了解專案目前如何管理版本（例如 pyproject.toml、setup.py、__version__）。提議的 workflow 使用 'taj54/universal-version-bump' action；檢查其文件。在 fork 中測試該 workflow，以確保它正確更新版本文件並建立 pull request。

由索引模型根據 Issue 內容生成。