fs/walk do not include folders if exts option is given

[devingfx]

Describe the bug

Using fs/walk or fs/walkSync, if exts options is given, and includeDirs: true (default), the folders name are tested against exts extensions what is a non-sense and will most of time exclude the folder (cause 🤷🏻‍♂️ they don't have extension).

Steps to Reproduce

walk(path, {
	includeDirs: true,
	exts: ['js','es','ts']
})

Expected behavior

When including folders, their name have to be tested against match or skip but not exts

Environment

• OS: linux mint
• deno version: 1 & 2
• std version: jsr:@std/fs/1.0.18/walk.ts