Dependency maintenance: consume ESPressio Timing 2.2.4

[LK-Simon]

Summary

Refresh ESPressio ESP-Now after the Serializable 0.10.2 downstream cascade.

Scope

• Prepare ESPressio ESP-Now 0.5.2.
• Update Timing baseline to 2.2.4 once released.
• Refresh current README, changelog, dependency chart, metadata, and CI references.
• Keep Event integration optional and avoid strengthening the Event/ESP-Now reciprocal dependency.

Release

Target patch release: 0.5.2.