Use std::string_view and fmtlib across all libraries (#3402)

- Twine, StringRef, Format, and NativeFormatting have been removed
- Logging now uses fmtlib style formatting
- Nearly all uses of wpi::outs/errs have been replaced with fmt::print() or
std::puts()/std::fputs() (for unformatted strings).
- A wpi/fmt/raw_ostream.h header has been added to enable
fmt::print() with wpi::raw_ostream

hal/src/main/native/sim/HALInternal.h

@@ -6,14 +6,14 @@
 
 #include <stdint.h>
 
-#include <wpi/Twine.h>
+#include <string_view>
 
 namespace hal {
-void SetLastError(int32_t* status, const wpi::Twine& value);
-void SetLastErrorIndexOutOfRange(int32_t* status, const wpi::Twine& message,
+void SetLastError(int32_t* status, std::string_view value);
+void SetLastErrorIndexOutOfRange(int32_t* status, std::string_view message,
                                  int32_t minimum, int32_t maximum,
                                  int32_t channel);
-void SetLastErrorPreviouslyAllocated(int32_t* status, const wpi::Twine& message,
+void SetLastErrorPreviouslyAllocated(int32_t* status, std::string_view message,
                                      int32_t channel,
-                                     const wpi::Twine& previousAllocation);
+                                     std::string_view previousAllocation);
 }  // namespace hal