Re-enable harcdoded prompt sizing for windows (com-lihaoyi#4059)

Was meant to land in com-lihaoyi#4053 but
got lost in the merge

This hardcoding is just a hack until
com-lihaoyi#4055 is resolved

runner/client/src/mill/runner/client/MillProcessLauncher.java

@@ -213,14 +213,19 @@ static int getTerminalDim(String s, boolean inheritError) throws Exception {
 
   static void writeTerminalDims(boolean tputExists, Path serverDir) throws Exception {
     String str;
-    if (!tputExists) str = "0 0";
-    else {
-      try {
-        if (java.lang.System.console() == null) str = "0 0";
-        else str = getTerminalDim("cols", true) + " " + getTerminalDim("lines", true);
-      } catch (Exception e) {
-        str = "0 0";
+
+    try {
+      if (java.lang.System.console() == null) str = "0 0";
+      else {
+        if (!tputExists) {
+          // Hardcoded size of a quarter screen terminal on 13" windows laptop
+          str = "78 24";
+        } else {
+          str = getTerminalDim("cols", true) + " " + getTerminalDim("lines", true);
+        }
       }
+    } catch (Exception e) {
+      str = "0 0";
     }
     Files.write(serverDir.resolve(ServerFiles.terminfo), str.getBytes());
   }