feat: event-bus to be async to allow for non-blocking callbacks

[Swiftwork]

BREAKING CHANGE: subscribe is now asynchronous and requires await before call to unsubscribe.

[Swiftwork]

Delaying PR to research if a more browser-friendly JSON schema library like Ajv should be used, which could also be a breaking change.

[Copilot]

Pull Request Overview

This PR makes the EventBus API fully asynchronous and non-blocking, replaces the old schema/validation implementation, and adds structured logging and replay controls.

• Convert subscribe and publish methods to return Promises for async callbacks.
• Replace raw object storage with a Map<string,ChannelSubscription> and integrate fast-equals + jsonschema Validator.
• Introduce log levels, replay clearing, and update documentation/tests accordingly.

Reviewed Changes

Copilot reviewed 8 out of 10 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
src/event-bus.ts	Refactor to async API, add Map-based subscriptions, logging, validation, and clearReplay.
src/event-bus.spec.ts	Update tests to await async subscribe/publish, cover new features, and fix wildcard behavior.
rollup.config.js	Add JSON plugin, node:fs import, external deps via regex, and adjust outputs.
package.json	Bump version/deps, add exports and sideEffects, update packageManager.
docs/react-component.js	Rewrite example into custom hook with async init/cleanup.
README.md	Extend API docs for constructor options, async methods, clearReplay.
.github/workflows/ci.yml	Extend CI matrix to Node 22.x & 24.x.
.github/workflows/cd.yml	Update CD to target Node 24.x.

Comments suppressed due to low confidence (1)

src/event-bus.ts:80

• The code defaults logLevel to 'error', but the doc comment says 'info' is the default. Align the implementation and docs on the chosen default log level.

      logLevel: 'error',

[github-actions]

🎉 This PR is included in version 3.0.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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