Clean up issue labels?

[spenserblack]

There are some redundant issue labels, like:

• doc and https://github.com/o2sh/onefetch/labels/documentation
• feat and feature request

Also, not sure if we need the Resolution: Duplicate and Resolution: Invalid now that issues can be closed-as-duplicate and closed-as-invalid.

[o2sh]

Good point, I've removed the label documentation, Resolution: Duplicate Resolution: Invalid and Resolution: wontfix