chore: enhance ts

Author: w2xi

src/generate.ts

@@ -1,6 +1,6 @@
 import { emoji, characters, NodeTypes } from './config'
-import { Options, TreeNode } from './type'
 import { blue } from 'picocolors'
+import type { Options, TreeNode } from './type'
 
 const lastDirStack: boolean[] = []
 

src/handleOptions.ts

@@ -1,6 +1,6 @@
 import fs from 'fs'
-import { Options } from './type'
 import { fileExistSync } from './utils'
+import type { Options } from './type'
 
 export const onExits: ((output: string) => void)[] = []
 

src/index.ts

@@ -5,7 +5,7 @@ import { toTree } from './toTree'
 import { generate } from './generate'
 import pkg from '../package.json'
 import { handleOptions, onExits } from './handleOptions'
-import { Options } from './type'
+import type { Options } from './type'
 
 program
   .name('treei')

src/utils.ts

@@ -1,5 +1,5 @@
 import fs from 'fs'
-import { TreeNode } from './type'
+import type { TreeNode } from './type'
 
 // check if a file or directory exists.
 export function fileExistSync(path: string) {

test/toTree.spec.ts

@@ -1,8 +1,8 @@
 import { describe, test, expect } from 'vitest'
 import { toTree } from '../src/toTree'
-import { Options } from '../src/type'
 import { NodeTypes } from '../src/config'
 import { getMaxLayer } from '../src/utils'
+import type { Options } from '../src/type'
 
 describe('toTree', () => {
   const options: Options = {