Made changes for Desktop app to work

crates/librqbit_core/src/directories.rs

@@ -0,0 +1,6 @@
+use anyhow::Context;
+
+pub fn get_configuration_directory(application: &str) -> anyhow::Result<directories::ProjectDirs> {
+    directories::ProjectDirs::from("com", "rqbit", application)
+        .with_context(|| format!("cannot determine project directory for com.rqbit.{application}"))
+}

crates/librqbit_core/src/lib.rs

@@ -1,4 +1,5 @@
 pub mod constants;
+pub mod directories;
 pub mod id20;
 pub mod lengths;
 pub mod magnet;