User having unexpected symbols prevent f3d from loading config

[Wardergrip]

Describe the bug
A clear and concise description of what the bug is, a screenshot helps a lot.

Error:
F3D encountered an unexpected exception: No mapping for the Unicode character exists in the target multi-byte code page.

To Reproduce
Steps to reproduce the behavior:

1. Be a windows user with a unexpected token, f.e. my name is Reï
2. try to open an fbx

Expected behavior
A clear and concise description of what you expected to happen.

You expect to see the model

System Information:

• OS: Win11
• GPU and GPU driver: NVIDIA GeForce RTX 4070 Laptop GPU

F3D Information
Paste the content of f3d --version: 2.5.0

Additional context
Add any other context about the problem here.

Discord thread: https://discordapp.com/channels/1046005690809978911/1306265861094506517

[mwestphal]

this should be reproducable on windows by putting a config file named reï.json and pointing to it with --config.

I will try to reproduce it.