Add single-instance tauri plugin (#261)

Co-authored-by: lukas <lukas.walter@aceart.de>

src-tauri/Cargo.lock

@@ -450,6 +450,7 @@ dependencies = [
  "serde_json",
  "tauri",
  "tauri-build",
+ "tauri-plugin-single-instance",
 ]
 
 [[package]]
@@ -3631,6 +3632,20 @@ dependencies = [
  "tauri-utils",
 ]
 
+[[package]]
+name = "tauri-plugin-single-instance"
+version = "0.0.0"
+source = "git+https://github.com/tauri-apps/plugins-workspace?branch=v1#562425644ef7c11a7b301a30c07a8c8b545621a8"
+dependencies = [
+ "log",
+ "serde",
+ "serde_json",
+ "tauri",
+ "thiserror",
+ "windows-sys 0.52.0",
+ "zbus",
+]
+
 [[package]]
 name = "tauri-runtime"
 version = "0.14.3"