Reduced the details of the non-chrono formatting information. This has
been shipped and these details part of P0645 which is still documented.
Removing this information keeps the information up-to-date.
Adds the formatters required for the types chrono namespace.
Reviewed By: ldionne, #libc
Differential Revision: https://reviews.llvm.org/D122735
Mark the now-done [cmp.result] in spaceship projects as complete;
normalize some status markers for papers and projects; fix alignment
and line breaks in spaceship projects, add links to standard
Differential Revision: https://reviews.llvm.org/D108502
Mark de Wever