React Collapse Component

rc-collapse is a foundational React UI component for creating collapsible panels and accordions. This package, at version 4.0.0, is effectively the final major release under the `rc-collapse` name. Development and active maintenance have since transitioned to the `@rc-component/collapse` package, which continues to evolve the component's features and API. While `rc-collapse@4.0.0` is stable and functional for its specified React peer dependencies (`>=16.9.0`), new features, bug fixes, and long-term support are primarily focused on the successor package. It provides basic collapse functionality with options for accordion mode, custom expand icons, and panel content destruction, but its API for defining panels via `Collapse.Panel` components is superseded by an `items` prop in the newer `@rc-component/collapse` package.