feat: replace hosts file with DLL injection hook

Adds openfut-hook/, a Windows DLL (cdylib, x86_64-pc-windows-gnu) that
patches the IAT of FIFA 23 at load time to redirect getaddrinfo calls
for fut.ea.com / utas.*.fut.ea.com to 127.0.0.1, sending all FUT
traffic to the local bridge — no /etc/hosts changes needed.

Deployment: the launcher copies openfut_hook.dll into the FIFA 23 game
folder as version.dll (a DLL FIFA loads but delegates to system).
Proton picks up the local copy automatically when you set:
  WINEDLLOVERRIDES="version=n,b" %command%
in Steam launch options.

Also updates cert install to try the Wine/Proton cert store (wine
certutil) before falling back to the Linux system CA store, and removes
all hosts file code from setup.rs / app.rs.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/config.rs

@@ -11,6 +11,10 @@ pub struct LauncherConfig {
     pub bridge_captures_dir: String,
     pub bridge_core_url: String,
     pub bridge_tls_enabled: bool,
+    /// Path to the built openfut_hook.dll (Windows DLL for Proton injection).
+    pub hook_dll_path: String,
+    /// FIFA 23 game folder inside the Proton prefix (where the DLL is deployed).
+    pub fifa_game_dir: String,
 }
 
 impl Default for LauncherConfig {
@@ -41,6 +45,15 @@ impl Default for LauncherConfig {
                 .into(),
             bridge_core_url: "http://127.0.0.1:8080".into(),
             bridge_tls_enabled: true,
+            hook_dll_path: base
+                .join("openfut-launcher/openfut-hook/target/x86_64-pc-windows-gnu/release/openfut_hook.dll")
+                .to_string_lossy()
+                .into(),
+            fifa_game_dir: dirs::home_dir()
+                .map(|h| h.join(".steam/steam/steamapps/common/FIFA 23"))
+                .unwrap_or_default()
+                .to_string_lossy()
+                .into(),
         }
     }
 }