🐛 BUG: C3 run in root of drive fails with `EPERM: operation not permitted`

### Which Cloudflare product(s) does this pertain to?

C3

### What version(s) of the tool(s) are you using?

2.16.1

### What version of Node are you using?

20.12.0

### What operating system and version are you using?

Windows 11

### Describe the Bug

### Observed behavior

When running `npm create cloudflare@latest` in the root of a drive in Windows results in the following error:

```
PS E:\> npm create cloudflare@latest

using create-cloudflare version 2.16.1

╭ Create an application with Cloudflare Step 1 of 3
│
├ In which directory do you want to create your application?
│ dir ./spring-lab-d577
│
╰ ERROR Error: EPERM: operation not permitted, mkdir 'E:\'
npm ERR! code 1
npm ERR! path E:\
npm ERR! command failed
npm ERR! command C:\WINDOWS\system32\cmd.exe /d /s /c create-cloudflare
```

Using all defaults, just hitting enter with the randomly generated dir name.

### Expected behavior
I would expect this to work without issue. `npm create astro@latest` in `E:/` for example works fine.

Start by reproducing `npm create cloudflare@latest` from a Windows drive root with the default randomly generated directory, using the reported Node 20.12.0 and C3 2.16.1 versions. Trace the `create-cloudflare` entry point and its directory creation path, then verify that application creation succeeds from a drive root without attempting to mkdir the drive itself.

Written by the indexing model from the issue text.