Implement Virtual Scroll to load 6k sites

[nicobytes]

Parent Issue

#28494

Current behavior

The actual field when there are more than 6k sites is so slow and the TreeSelect does not work well, the idea is to clone the TreeSelect and implement virtual scrolling to avoid this behavior.

Video Support

video.mp4

Steps for IQA

1. Ask Nicolas Molina or Daniel Silva for a db with 7k sites.
2. Load this db into your docker db

# Copy the db to your container
docker cp ./wth.sql postgres-dotcms:./
# Load this db
docker exec -it postgres-dotcms psql -U dotcms -f ./wth.sql <your_db>

3. Enable DOT_FEATURE_FLAG_NEW_EDIT_PAGE in your docker compose.

4. Create a new content type using the new editor content

5. Add a SiteOrFolder field

6. Test this field by creating new content based on this schema

[dsilvam]

Internal QA: Needs work.

When scrolling down, the scroll bar indicator gets lost when approaching the bottom/end.
When scrolling back up, the scroll bar indicator gets lost when approaching the top/beginning.

Screen.Recording.2024-06-17.at.11.39.26.AM.mov

[dsilvam]

Passed Internal QA: Scrolling issue reported above not happening anymore.

[josemejias11]

Approved: Tested on trunk_f319f84, Docker, macOS 14.5, FF v126.0.1