Fechamento de Caixa - Tauri 2 initial commit

- Storage: SQLite local via rusqlite
- Supabase: REST API via reqwest
- Printer: USB ESC/POS for TM-T20
- Frontend: vanilla HTML (form-v9.3 ported)
- Build: GitHub Actions for Linux/Windows/macOS

src-tauri/Cargo.toml

@@ -0,0 +1,34 @@
+[package]
+name = "fechamento-caixa"
+version = "0.1.0"
+edition = "2021"
+
+[build-dependencies]
+tauri-build = { version = "2", features = [] }
+
+[dependencies]
+tauri = { version = "2", features = ["devtools"] }
+tauri-plugin-shell = "2"
+tauri-plugin-dialog = "2"
+tauri-plugin-fs = "2"
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"
+rusqlite = { version = "0.32", features = ["bundled"] }
+reqwest = { version = "0.12", features = ["json", "blocking"] }
+tokio = { version = "1", features = ["full"] }
+serde_yaml = "0.9"
+uuid = { version = "1", features = ["v4"] }
+chrono = { version = "0.4", features = ["serde"] }
+log = "0.4"
+env_logger = "0.11"
+thiserror = "2"
+dirs = "5"
+
+[target.'cfg(windows)'.dependencies]
+windows = { version = "0.58", features = ["Win32_Foundation", "Win32_Devices_Usb", "Win32_Storage_FileSystem"] }
+
+[profile.release]
+strip = true
+lto = true
+codegen-units = 1
+panic = "abort"