scaffold the crate

Initial layout for an async Rust port of the Python claude-agent-sdk. Sets
up Cargo.toml on 2024 edition, MIT LICENSE matching the upstream Python SDK's
text with the Sulkta copyright appended, a workspace .gitignore, and a
README laying out the v0.1 scope and the Python -> Rust mapping table.

No source modules yet — those land in the following commits.

Cargo.toml

@@ -0,0 +1,39 @@
+[package]
+name = "claude-agent-sdk"
+version = "0.0.1"
+edition = "2024"
+license = "MIT"
+description = "Async Rust SDK for the Claude Agent CLI (subprocess-based, mirrors the Python claude-agent-sdk)."
+repository = "https://git.sulkta.com/Sulkta-OSS/claude-agent-sdk-rust"
+readme = "README.md"
+keywords = ["claude", "anthropic", "agent", "sdk", "async"]
+categories = ["api-bindings", "asynchronous"]
+rust-version = "1.85"
+
+[dependencies]
+tokio = { version = "1", features = ["full"] }
+tokio-stream = "0.1"
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"
+thiserror = "2"
+tracing = "0.1"
+futures-core = "0.3"
+async-stream = "0.3"
+
+[dev-dependencies]
+anyhow = "1"
+tokio = { version = "1", features = ["macros", "rt-multi-thread", "test-util"] }
+tracing-subscriber = { version = "0.3", features = ["env-filter"] }
+futures-util = "0.3"
+
+[[example]]
+name = "basic"
+path = "examples/basic.rs"
+
+[[example]]
+name = "with_options"
+path = "examples/with_options.rs"
+
+[[example]]
+name = "interactive"
+path = "examples/interactive.rs"