Spike: Port the examples/todo app to JavaScript

[hacksparrow]

Port the examples/todo app to JSLB4 API. CRUD only, no Geocoder service integration.

Acceptance criteria

• Should replicate the original behavior, without the Geocoder service integration.
• Use routes to implement REST endpoints, not Controllers. See Spike: Create Route in JSLB4 #2474

[dhmlau]

Before working on this task, these 2 spikes (in order) #2474 and #2557 should be done first.

[stale]

This issue has been marked stale because it has not seen activity within six months. If you believe this to be in error, please contact one of the code owners, listed in the CODEOWNERS file at the top-level of this repository. This issue will be closed within 30 days of being stale.

[stale]

This issue has been closed due to continued inactivity. Thank you for your understanding. If you believe this to be in error, please contact one of the code owners, listed in the CODEOWNERS file at the top-level of this repository.