feat(fs): resolve content URIs on Android (#1658)

* Implemented writeTextFile on Android.

* Added license headers.

* fix fmt checks.

* implement more file APIs

* change file

* cleanup

* refactor dialog plugin to leverage new FS APIs

* implement metadata functions

* fix build

* expose FS rust API

* resolve resources on android

* update pnpm

* update docs

---------

Co-authored-by: Lucas Nogueira <lucas@tauri.app>

plugins/dialog/src/error.rs

@@ -23,6 +23,8 @@ pub enum Error {
     FileSaveDialogNotImplemented,
     #[error(transparent)]
     Fs(#[from] tauri_plugin_fs::Error),
+    #[error("URL is not a valid path")]
+    InvalidPathUrl,
 }
 
 impl Serialize for Error {