Windows: enable nimRawSetjmp by default

See nim-lang#19197. The default setjmp can randomly segfault on windows

Author: Menduist

config/config.nims

@@ -20,5 +20,10 @@ when defined(nimStrictMode):
     switch("hintAsError", "ConvFromXtoItselfNotNeeded")
     # future work: XDeclaredButNotUsed
 
+if defined(windows):
+  # Avoid some rare stack corruption while using exceptions with a SEH-enabled
+  # toolchain: https://github.com/nim-lang/Nim/pull/19197
+  switch("define", "nimRawSetjmp")
+
 switch("define", "nimVersion:" & NimVersion)
 switch("define", "nimPreviewDotLikeOps")