[Feature Request]: Warns a user if they use Restore as an explicit target (/t:Restore;Build) instead of the /restore flag

### Summary

We should warn users when they use the Restore target specifically (`-t:Restore`) instead of `/restore` during a build - this is _very often_ a mistake and we should point users to the correct version.

### Background and Motivation

Users of the new CLI-based MSBuild property/item syntax often run into issues with uninitialized repositories, so they add `-t:Restore` and then wonder why their tooling only works after the first run. This is the core reason, and we should guide them to using the switch.

### Proposed Feature

When

* Restore is part of the targets list, and
* a project contains NuGet packages, and
* a nuget dependency file was created during the build
* then issue a warning so the user knows they should use /restore instead of /t:Restore

### Alternative Designs

_No response_