:sig
bool component_exists(String name)

:desc
Checks whether a component file can be resolved from the current page context.

Resolution tries the exact name first and then the `components/` shorthand form.

If `name` contains a colon, only the file portion is used for existence checks.

This is useful when a page wants to render an optional component if it is present without hard-failing when it is missing.

:see
>ob