feat(developer): add a hint to the compiler to note that 0x0D will never be seen in context

Note: we could add a hint to the keyboard compiler in the future to note that 0x0D will never be seen in context (noting that more work needs to be done on KMW for this to be the case).

_Originally posted by @mcdurdin in https://github.com/keymanapp/keyman/issues/10471#issuecomment-1913884903_