feat: Allow getting inner PathBuf from SafePathBuf (#14908)

* Allow getting inner PathBuf from SafePathBuf

SafePathBuf implements AsRef<Path> which is ergonomic and useful.
However, some APIs take owned PathBufs. This leads to clunky code where
the caller has to get a &Path from the SafePathBuf then take ownership
of that path. Ideally, if a user has a SafePathBuf and needs a PathBuf,
they won't need to allocate again just to get the inner PathBuf back.

* Apply suggestion from @Legend-Master

.changes/safepathbuf_into_pathbuf.md

@@ -0,0 +1,5 @@
+---
+"tauri": patch:enhance
+---
+
+Implement retrieving inner PathBuf from SafePathBuf to ease using APIs that require an owned PathBuf

crates/tauri/src/path/mod.rs

@@ -73,6 +73,12 @@ impl FromStr for SafePathBuf {
   }
 }
 
+impl From<SafePathBuf> for PathBuf {
+  fn from(path: SafePathBuf) -> Self {
+    path.0
+  }
+}
+
 impl<'de> Deserialize<'de> for SafePathBuf {
   fn deserialize<D>(deserializer: D) -> std::result::Result<Self, D::Error>
   where