Tildes in paths are not parsed correctly

[s3krit]

Issue summary

When using a tilde to indicate the home directory in the config.toml file, they are not expanded to /home/$USER.

Steps to reproduce

1. Create a new config file
2. Set the path of data, cache or music to something like ~/.eggplant
3. Run Eggplant using this config file

Expected behaviour

Eggplant creates the config files in ~/.eggplant/whatever

Observed behaviour

Eggplant creates a directory in the current working directory named ~, under which is the .eggplant directory.

[boreq]

This is normally a feature of a shell. Programming languages such as Go, Python or Rust (and probably others) will not automatically expand characters such as ~ in a way that a shell would. That is why I would not expect those features to work in a configuration file.

I do not know if other software attempts to expand such characters. I think software such as nginx or other similar software could be investigated to find out if they make an effort to handle such scenarios and if this behavior is expected.