Box, lasso selection to select multiple entities in the scene editor

Is your feature request related to a problem? Please describe.
I'm always frustrated when you have many entities with model component on the scene and you need to quickly select them and adjust their transformation or change some common parameter they might share. Tools like box or lasso selection would allow easier interaction with the scene without having to use the entity tree.

Describe the solution you'd like
So far when you press and hold the left mouse button on the scene. it does nothing. The box selection could be enabled by default. Alternatively it could be turned on from the top icons of the viewport.

Describe alternatives you've considered
Grouping entities in the Entity tree and the selecting the parent entity.

Additional context

The issue targets the scene editor viewport and requests box or lasso selection, but names no files, tests, or entry points. Start by locating the viewport's mouse interaction and entity-selection code, then review how selection is exposed in the Entity tree. Done means a documented interaction can select multiple scene entities and support shared transformation or parameter changes.