feat: add a basic timeline UI

[rot1024]

Requires reearth/reearth-backend#153

What I've done

In order to easily implement the timeline function, we have implemented a function to display the Cesium standard timeline UI.

• Adjustments to the appearance of the timeline UI are basically done by overriding the CSS.
• From the plugin API, you can also change the timeline settings using reearth.visualizer.overrideProperty.

What I haven't done

• Implementation of datetime field UI is not done yet.
• Changing the appearance of the timeline is done in a separate PR.
• In the future, there may be a means to completely self-build the UI so that any map engine can use the timeline. But not now.

How I tested

Manually tested on Chrome

[netlify]

✅ Deploy Preview for reearth-web ready!

Name	Link
🔨 Latest commit	75baec3
🔍 Latest deploy log	https://app.netlify.com/sites/reearth-web/deploys/629db0c4892d1d000851e6fc
😎 Deploy Preview	https://deploy-preview-232--reearth-web.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site settings.

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (main@28d377b). Click here to learn what that means.
The diff coverage is n/a.

❗ Current head b64548c differs from pull request most recent head 75baec3. Consider uploading reports for the commit 75baec3 to get more accurate results

@@           Coverage Diff           @@
##             main     #232   +/-   ##
=======================================
  Coverage        ?   50.98%           
=======================================
  Files           ?       58           
  Lines           ?     1165           
  Branches        ?      184           
=======================================
  Hits            ?      594           
  Misses          ?      508           
  Partials        ?       63