Function filterTree

filterTree<T = TreeNode, K extends string = "children">(
    tree: Tree<T, K>[],
    match: (node: T) => boolean,
    childrenKey?: K,
): Tree<T, K>[]
根据匹配函数过滤树节点，并修剪不匹配的分支 Filter tree nodes by match function and prune unmatched branches
Type Parameters
- T = TreeNode
  节点类型 / node type
- K extends string = "children"
  children 字段名，默认为 'children' / children key name, default 'children'
Parameters
- tree: Tree<T, K>[]
  树数组 / tree array
- match: (node: T) => boolean
  匹配函数，返回 true 表示保留节点 / match function, returns true to keep node
- OptionalchildrenKey: K = ...
  子节点字段名 / children field name
Returns Tree<T, K>[]
过滤后的树数组 / filtered tree array
Example
```
// 根据标题搜索
// Search by title
const result = filterTree(tree, (node) => node.title.includes('query'))
```
- Defined in src/tree.ts:78