add `sass` to `stylePreprocessorOptions` for `browser-esbuild` builder

[Licen-it]

Command

config

Description

Would it be possible to have the same configuration flags added in this PR: #28627 but for the browser-esbuild builder? (if possible for angular19)

Describe the solution you'd like

No response

Describe alternatives you've considered

No response

[Licen-it]

@alan-agius4 i see in the linked issue you mentioned to switch to application builder, but i don't need all the support that builder is providing (like the node server), also when i tried it, i had many issues with our current configuration that i couldn't find how to solve, then i decided to go with browser-esbuild.
But i have a question now: is the future of angular with application builder? or will you always keep support for browser builds?