Refactor Tauri crate into a library and add OS version header

src-tauri/tests/helper_tests.rs

@@ -1,14 +1,9 @@
-#[path = "../src/helper.rs"]
-mod helper;
-#[path = "../src/models.rs"]
-mod models;
-
-use helper::{
+use proxywarden_lib::helper::{
     helper_action_requires_elevation, install_request, parse_helper_response,
     proxifyre_apply_request, service_request, HelperAction, HelperCommandOutput,
     HelperCommandRunner, HelperCommandSpec, HelperError, HelperResponse, StructuredHelper,
 };
-use models::ComponentId;
+use proxywarden_lib::models::ComponentId;
 use serde_json::json;
 use std::cell::RefCell;
 use std::path::PathBuf;