Enable color diagnostics for Swift compilation actions.
Enable color diagnostics for Swift compilation actions.

LLVM's detection of stderr being a color-capable terminal does not handle Bazel builds correctly because of piping. This forces the front-end to output color diagnostics to improve their legibility.

RELNOTES: Diagnostics are now printed in color.
PiperOrigin-RevId: 208687024

bazelbuild/rules_swift,bazelbuild/rules_swift