Enable central package management in repo

[cheenamalhotra]

Onboarding to modern central package management solution. For reference: https://learn.microsoft.com/en-us/nuget/consume-packages/Central-Package-Management#enabling-central-package-management

Also fixed #3330

[Tornhoof]

Personally I'd recommend enabling transivite pinning too:
https://learn.microsoft.com/en-us/nuget/consume-packages/central-package-management#transitive-pinning
to allow for e.g. specific versions of transitive packages without e.g. security vulnerabilities.

[paulmedynski]

Some formatting nits.

[benrr101]

I guess it's not bad. It's kinda doing the same thing we were doing just with built-in support.

[mdaigle]

Looks good. Added some notes on things that changed.

[benrr101]

@cheenamalhotra Hope you don't mind I resolved your merge conflict for you - just want to get this out the door for the preview release

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.58%. Comparing base (55095ef) to head (e0197bc).
Report is 3 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #3333       +/-   ##
===========================================
+ Coverage   65.34%   92.58%   +27.23%     
===========================================
  Files         300        6      -294     
  Lines       65603      310    -65293     
===========================================
- Hits        42871      287    -42584     
+ Misses      22732       23    -22709     

Flag	Coverage Δ
addons	92.58% <ø> (ø)
netcore	?
netfx	?

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[cheenamalhotra]

Getting there @paulmedynski , hang on!