[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.

wpinet/examples/dsclient/dsclient.cpp

@@ -4,8 +4,8 @@
 
 #include <cstdio>
 
-#include <fmt/format.h>
 #include <wpi/Logger.h>
+#include <wpi/print.h>
 
 #include "wpinet/DsClient.h"
 #include "wpinet/EventLoopRunner.h"
@@ -27,7 +27,7 @@ int main() {
   loop.ExecAsync([&](uv::Loop& loop) {
     client = wpi::DsClient::Create(loop, logger);
     client->setIp.connect(
-        [](std::string_view ip) { fmt::print("got IP: {}\n", ip); });
+        [](std::string_view ip) { wpi::print("got IP: {}\n", ip); });
     client->clearIp.connect([] { std::fputs("cleared IP\n", stdout); });
   });