Feature/e2e test signaling

[voluntas]

This pull request includes several changes to add new end-to-end (E2E) tests, update the SoraClient class, and modify the package.json file. The key changes are summarized below:

E2E Testing Enhancements:

• Added a new E2E test for "type": "switched" in tests/switched.spec.ts. This test verifies various aspects of the signaling and connection process, including checking console logs and obtaining statistics reports.

Code Updates:

• Updated the SoraClient class in examples/sendonly/main.mts to include a new onSignaling method for handling signaling events. This method logs signaling events of type onmessage-switched. [1] [2]
• Renamed the onnotify method to onNotify for consistency.

Documentation and Configuration:

• Updated CHANGES.md to include the addition of the new E2E test and changes to the canary release process.
• Modified package.json to update the packageManager version and adjust the formatting of the files array. [1] [2]