[wpiutil] Upgrade to fmt 10.2.1, add wpi::print (#6161)

We now use a wrapper (wpi::print) to catch exceptions since we can't patch
std::print() to not throw when we ultimately migrate to it.

fmtlib and std format/print throw the same exceptions and always have. We previously patched fmt::print() to not throw a write failure exception, but we can't do that for std::print(); wpi::print() is the migration plan.

wpiutil/examples/writelog/writelog.cpp

@@ -8,9 +8,8 @@
 #include <string>
 #include <vector>
 
-#include <fmt/format.h>
-
 #include "wpi/DataLog.h"
+#include "wpi/print.h"
 
 int main(int argc, char** argv) {
   using std::chrono::duration_cast;
@@ -66,7 +65,7 @@ int main(int argc, char** argv) {
 
   for (const auto& [name, fn] : testVec) {
     auto resVec = std::vector<microseconds::rep>();
-    fmt::print("{}: ", name);
+    wpi::print("{}: ", name);
 
     for (int i = 0; i < kNumRuns; ++i) {
       auto start = high_resolution_clock::now();
@@ -75,7 +74,7 @@ int main(int argc, char** argv) {
       resVec.push_back(duration_cast<microseconds>(stop - start).count());
     }
 
-    fmt::print("{}us\n",
+    wpi::print("{}us\n",
                std::accumulate(resVec.begin(), resVec.end(), 0) / kNumRuns);
   }