refactor(rust): cleanup path handling

- Avoids unnecessary string allocation when tracing paths
- Replaces `mut path & path.push()` with `path.join()`
- Avoids unncessary cloning of paths where applicable
- Use `dunce` crate to remove `UNC` prefix
- Improve performance of resolving `~` by avoiding unnecessary string allocations
- Resolve `~`, `$Env:USERPROFILE` and `$HOME` consistenly between different code paths
- Use `PathBuf` instead of `String` for paths in CLI args

I may have missed a couple of places but I think I covered 90% of path handling in the codebase

Cargo.lock

@@ -328,6 +328,12 @@ dependencies = [
  "windows-sys 0.48.0",
 ]
 
+[[package]]
+name = "dunce"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "56ce8c6da7551ec6c462cbaf3bfbc75131ebbfa1c944aeaa9dab51ca1c5f0c3b"
+
 [[package]]
 name = "dyn-clone"
 version = "1.0.16"
@@ -824,6 +830,8 @@ version = "0.1.19"
 dependencies = [
  "clap",
  "color-eyre",
+ "dirs",
+ "dunce",
  "schemars",
  "serde",
  "serde_json",
@@ -840,6 +848,7 @@ dependencies = [
  "color-eyre",
  "derive-ahk",
  "dirs",
+ "dunce",
  "fs-tail",
  "heck",
  "komorebi-core",