Loads a theme's components.exs: an optional file at the theme root defining function-component modules (use Phoenix.Component) that every HEEx template in that theme can call as <.name …>.

Compiled at runtime — the same escape-hatch mechanism as theme.exs and site extension scripts (ADR 0002), so binary-mode sites get the full feature. Compilation is cached on the file's content hash; cherry serve picks up edits because a changed file is a changed hash, and the stale modules are purged before the recompile.