#[act_component]Expand description
Attribute macro for ACT component modules. Takes no arguments.
Transforms a module of #[act_tool] functions into a complete WIT component
implementation (wit-bindgen world, Guest impl, list_tools/call_tool
dispatch, plus session-provider when #[session_open]/#[session_close] are
present). Component metadata and skills are embedded by act-build pack, not
this macro.