fix(script): a script that throws anything at all exits 1

RunScript caught std::exception only. Anything else a script threw went
on across the project.so boundary, and crafter-build ended in
std::terminate instead of reporting the script's failure.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

implementations/Crafter.Build-Script.cpp

@@ -96,5 +96,9 @@ returned; ctx.args holds the arguments.)msg");
         Progress::Clear();
         std::println(std::cerr, "script '{}' failed: {}", found->name, e.what());
         return 1;
+    } catch (...) {
+        Progress::Clear();
+        std::println(std::cerr, "script '{}' failed: it threw something that isn't a std::exception", found->name);
+        return 1;
     }
 }

tests/Script/main.cpp

@@ -120,6 +120,8 @@ int main() {
         Configuration cfg;
         cfg.scripts.push_back({"throws", [](ScriptContext&) -> std::int32_t { throw std::runtime_error("no such tool"); }});
         Check(RunScript(cfg, {.name = "throws", .named = true}) == 1, "a throwing script exits 1");
+        cfg.scripts.push_back({"throwsInt", [](ScriptContext&) -> std::int32_t { throw 7; }});
+        Check(RunScript(cfg, {.name = "throwsInt", .named = true}) == 1, "and so does one throwing something that isn't a std::exception");
     }
 
     // Declarations that cannot work are refused before anything runs, also