feat(core): use PathExt to unify env var resolution

This new implementation allows for expanding any environment variable so
it is not limited to just `~`, `$HOME`, `$Env:USERPROFILE` and
`$Env:KOMOREBI_CONFIG_HOME`.

It expands the follwing formats:
- CMD: `%variable%`
- PowerShell: `$Env:variable`
- Bash: `$variable`

I searched throughout the code base for path and migrate any code that
might need to PathExt::replace_env.

It is possible that I might have missed a few places due to my
unfamiliarity with the code base, so if you find any, please let me
know.

Most of the paths that needed this trait, are in:

- Clap arguments, and that was handled by #[value_parse] attribute and a
  helper function.
- SocketMessage and that was handled by custom deserialization with the
  help of serde_with crate

komorebi-client/src/lib.rs

@@ -12,7 +12,7 @@ pub use komorebi::config_generation::MatchingRule;
 pub use komorebi::config_generation::MatchingStrategy;
 pub use komorebi::container::Container;
 pub use komorebi::core::config_generation::ApplicationConfigurationGenerator;
-pub use komorebi::core::resolve_home_path;
+pub use komorebi::core::replace_env_in_path;
 pub use komorebi::core::AnimationStyle;
 pub use komorebi::core::ApplicationIdentifier;
 pub use komorebi::core::Arrangement;