feat: Implement initial backend structure with API, WebSocket, core models, services, and documentation, alongside dependency and gitignore updates.

src/services/install/mod.rs

@@ -0,0 +1,16 @@
+use crate::ws::WsEvent;
+use std::collections::HashMap;
+use tokio::sync::broadcast;
+
+pub mod linux;
+pub mod macos;
+pub mod windows;
+
+pub trait InstallStrategy: Send + Sync {
+    fn install(
+        &self,
+        details: &mut HashMap<String, String>,
+        issues: &mut Vec<String>,
+        broker: &broadcast::Sender<WsEvent>,
+    ) -> Result<(), String>;
+}