Add projects for out-of-proc WinRT API and test application

[abeltrano]

Type

• Bug fix
• Feature addition
• Feature update
• Breaking change
• Non-functional change
• Documentation
• Infrastructure

Goals

Put the project structure in place to enable full-fledged service API development.

Technical Details

• Move VS solution, .gitgnore, and CMakeLists.txt to parent directory and rename appropriately.
• Add a WinRT component project to contain the eventual out-of-proc C++/WinRT APIs.
• Add a WinRT executable project to contain a service-like runtime that hosts the out-of-proc components.
  • This executable is meant to exercise registration-free WinRT components as they would be used in the service.

Test Results

Compile-tested only for now. Additional testing will be done in follow-up PRs when the future work is completed.

Reviewer Focus

None

Future Work

• The test application needs to be tested and extended such that it doesn't exit immediately.
• The in-proc APIs need to be modified to contain a private instance of the out-of-proc NearObjectService component.

Checklist

• Build target all compiles cleanly.
• clang-format and clang-tidy deltas produced no new output.
• Newly added functions include doxygen-style comment block.