Pre-testing phase

Cargo.toml

@@ -0,0 +1,32 @@
+[package]
+name = "r2client"
+version = "0.1.0"
+edition = "2024"
+
+[lib]
+
+[dependencies]
+sha2 = "0.10.9"
+bytes = "1.10.1"
+reqwest = { version = "0.12.19", features = ["blocking"] }
+chrono = "0.4.41"
+hex = "0.4.3"
+hmac = "0.12.1"
+xmltree = "0.11.0"
+thiserror = "2"
+async-trait = "0.1.89"
+async-std = { version = "1.0", optional = true }
+tokio = { version = "1.0", features = ["rt-multi-thread"], optional = true }
+futures-executor = { version = "0.3", optional = true }
+urlencoding = "2.1.3"
+http = "1.3.1"
+
+[dev-dependencies]
+tokio = { version = "1", features = ["macros", "rt-multi-thread"] }
+dotenv = "0.15"
+
+[features]
+async = ["tokio"]
+default = ["async"]
+sync = ["tokio/rt-multi-thread", "futures-executor"]
+async-std-runtime = ["async-std"]