Integrate with ExP to enable A/B controlled rollouts

[luabud]

Hi there!

Chatted with @bwateratmsft offline about integrating this extension with ExP to enable experimentation support. A few links/resources that may be helpful:

• CMake extension integration PR
• VS Code TAS Client package

[bwateratmsft]

PR #783 adds the experimentation client. I am planning to attend the office hours tomorrow to see what needs to be done on the EXP side.