feat(developer): add warning options to kmc

Adds --compiler-warnings-as-errors and --no-warn-deprecated-code options
to kmc command line and interfaces.

Note that most compilers do not yet honour these options, only kmc-kmn.

Both of these should be handled in error filtering and reporting rather
than at the compiler level, so management of these may be factored out
of kmcmplib and into kmc later (although this goal may be blocked by
kmcmpdll's need to also use them).