Optimize the NavBar Scaling using will-change-transform

[fgrgic]

Description

Changes:

• Removed: throttleWithTrailingInvocation utility (no longer used)
• Replaced: Throttled scroll handler with direct event listener
• Updated: All animations to use transform scale instead of size/font changes
• Added: will-change-transform: tells the browser to create a separate GPU layer for an element, so CSS transforms run smoothly without expensive layout recalculations.

Contributor Checklist

Make sure to do the following steps if they are applicable to your PR:

• Update e2e tests: If you changed the /template/app, then make sure to do any neccessary updates to /template/e2e-tests also.
• Update demo app: If you changed the /template/app, then make sure to do any neccessary updates to /opensaas-sh/app_diff also. Check /opensaas-sh/README.md for details.
• Update docs: If needed, update the /opensaas-sh/blog/src/content/docs.