Function generateMergePaths

generateMergePaths(branches: string[]): string[][]
根据输入的分支数组生成合并路径
Parameters
- branches: string[]
  分支名称数组，按照合并顺序排列
Returns string[][]
返回合并路径数组，每个路径包含两个分支名称，表示从第一个分支合并到第二个分支
Example
```
console.log(generateMergePaths(['dev-xxx', 'dev', 'test']))
// -> [['dev-xxx','dev'], ['dev','test']]

console.log(generateMergePaths(['feature', 'dev', 'test', 'prod']))
// -> [['feature','dev'], ['dev','test'], ['test','prod']]
```
- Defined in src/modules/string.ts:328