[BUG] Font file imports give MIME type: `""` (blank string)

[InternetAstronaut]

Describe the bug
It seems that font imports fail on Windows platforms. I have noticed that the software reports:

importFile(): Could not import file google.ttf, filetype: "" is not supported.

To reproduce
Steps to reproduce the behavior:

1. Click and try to import a TTF file using the OS and browser
2. See vague error (could not import FILENAME)
3. Open the console
4. See error

Expected behavior
A FontAsset should be created and the font should be usable.

Screenshots

Editor version
Both 1.19.4 and 1.19.3 have the same issue.

Device

• Hardware: PC
• OS: Windows 11
• Browser: Chrome
• Version: 151.0.7922.108 (Official Build) (64-bit)

Do you have a suggested solution to this issue? (ex. has another program fixed this bug a certain way? Are you familiar with where in the code base someone would need to fix this issue?)
Maybe we should add filename-based extension checks.

Additional context
This has been discussed on the forums.