- Native step/cont moved to __step_native/__cont_native; public step()/cont()
defined in prelude.js wrap them and dispatch JS listeners on each stop.
- addEventListener/removeEventListener/clearListeners/listeners() registry on
globalThis, persistent for the daemon lifetime (independent of ctx.reset()).
- Event object carries {state, prev, stop_reason} plus breakpoint_id/signal/
exit_code as appropriate. Implements the SPEC 'Event Listeners' + 'Core Loop'.
- No-listener fast path keeps existing scripts zero-cost.
- examples/smarm_ctx_switch.js: worked session inspecting smarm's naked-asm
context switch; README updated (status table, listener API, deferred list).
