Compile 'n' run

Milestone

A source ISO/IEC 14882:2017 compliant file can be programmatically compiled into a shared library and its symbols then executed.

Functional requirements:

• The system shall support any ISO C++17 compliant source that all of GNU GCC >= 8, Clang/LLVM >= 8, and MSVC >= 16.24 compile
• The system shall cancel further processing of the source upon compilation error
• The system shall never invoke undefined behavior if a user-provided function is looped through in system code
• The system shall not attempt to run a shared library with undefined symbols that cannot be immediately resolved.

Non-functional requirements:

• Any latency induced by running this feature should not be significantly perceptible by the user
• The API for this feature should be straightforward