feat: add useTracking hook

[barinali]

Proposed Changes

This pull request aims to introduce a new React hook named useTracking that returns a function to fire tracking event. As the tracking is optional, the returned function may be no-op.

A short snippet of usage:

function YetAnotherReactComponent() {
  const track = useTracking();

  React.useEffect(function viewEvent() {
    track('view');
  }, []);
}

Checklist

Ensure you provide everything we need to review your contribution:

• Contribution meets our definition of done
• Pull request establishes context
  • Link to related issue(s), i.e. Closes {LINK_TO_ISSUE} or Related to {LINK_TO_ISSUE}
  • Brief textual description of the changes
  • Screenshots or short videos showing UI/UX changes
  • Steps to try out, i.e. using the @bpmn-io/sr tool

[Copilot]

Pull request overview

This PR introduces an internal useTracking React hook intended to integrate with an (optional) bpmn-js-tracking service, along with tests and dependency metadata updates.

Changes:

• Add optional peer dependency bpmn-js-tracking (with peerDependenciesMeta.optional).
• Add lib/hooks/useTracking.js hook that namespaces events and no-ops when tracking is unavailable.
• Add unit tests for the hook and update the changelog.

Reviewed changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
package.json	Adds bpmn-js-tracking as an optional peer dependency.
package-lock.json	Mirrors the optional peer dependency metadata in the lockfile.
lib/hooks/useTracking.js	Implements the new useTracking hook (currently not exported from the build entry).
lib/hooks/test/useTracking.spec.jsx	Adds tests covering namespacing and no-op behavior.
CHANGELOG.md	Documents the addition in the Unreleased section.

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[Copilot]

useTracking is added under lib/hooks, but the package only publishes dist (see package.json#files) and the build entry is lib/index.jsx. As-is, this hook won't be included in the built artifact or be importable by consumers. Please export it from the public entry (e.g. add a named export from lib/index.jsx and ensure it is emitted in dist), or otherwise wire it into the entry/component so it’s part of the build output.