v0.1.0

Prepare portable t2w release and docs

Constraint: v1 ships as portable binaries before native installers.
Confidence: high
Scope-risk: moderate
Directive: Keep release artifacts portable until CLI and Studio contracts stabilize.
Tested: cargo fmt --all --check; cargo build --locked --release --bin t2w --bin t2w-studio; cargo test --workspace; cargo build --locked --release --target x86_64-pc-windows-msvc --bin t2w --bin t2w-studio