Generate command-line program for Q# projects with an entry point

[bamarsha]

This is the "standalone executables" feature which allows Q# applications to run without a C# driver in the project.

TODO:

• Use entry point documentation for help text
• Support non-standard Q# types: Range, BigInt, Pauli, Result, and Unit
• Combine simulate and resources commands
• Handle parameters with the same name as a standard option
• Support custom simulators
• Support a default simulator in the project configuration
• Use option name constants added by Additional verification for entry points qsharp-compiler#399
• Add unit tests
• Add project test

[bettinaheim]

Looks good!