feat: Windows Setup Wizard (ostp-setup) with Tauri

- Tauri 2.0 based graphical installer
- Access Key parsing with AES-256-GCM encryption
- Windows Service installation via sc.exe
- WinTUN driver extraction from embedded resources
- System requirements checking (admin, AES-NI, OS version)
- Modern dark UI with step-by-step wizard flow
- Country/region selection for SNI mimicry

ostp-setup/Cargo.toml

@@ -0,0 +1,33 @@
+[package]
+name = "ostp-setup"
+version = "0.1.0"
+edition = "2024"
+authors = ["ospab.team"]
+description = "OSTP Windows Setup Wizard"
+license = "Proprietary"
+
+[lib]
+name = "ostp_setup_lib"
+crate-type = ["staticlib", "cdylib", "rlib"]
+
+[build-dependencies]
+tauri-build = { version = "2", features = [] }
+
+[dependencies]
+tauri = { version = "2", features = [] }
+tauri-plugin-shell = "2"
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"
+base64 = "0.22"
+aes-gcm = "0.10"
+rand = "0.8"
+sha2 = "0.10"
+winreg = "0.52"
+tokio = { version = "1", features = ["full"] }
+anyhow = "1"
+thiserror = "2"
+tracing = "0.1"
+
+[features]
+default = ["custom-protocol"]
+custom-protocol = ["tauri/custom-protocol"]