Reduce console printouts

build_web_common.bat

@@ -11,7 +11,7 @@ if "%do_codegen%"=="1"        ( call run_codegen.bat || goto :error )
 copy marketing_page\favicon.ico %OUTPUT_FOLDER%\favicon.ico
 @REM copy main.c %OUTPUT_FOLDER%\main.c || goto :error
 
-@echo on
+@echo off
 emcc ^
  -sEXPORTED_FUNCTIONS=_main,_end_text_input,_stop_controlling_input,_start_controlling_input,_read_from_save_data,_dump_save_data,_is_receiving_text_input^
  -sEXPORTED_RUNTIME_METHODS=ccall,cwrap^

run_codegen.bat

@@ -1,9 +1,9 @@
-@echo on
+@echo off
 
-echo Running codegen...
+@REM echo Running codegen...
 
 if exist gen\ (
-  echo "Codegen folder already exists, not deleting because that messes with vscode intellisense..."
+  @REM echo "Codegen folder already exists, not deleting because that messes with vscode intellisense..."
 ) else (
   mkdir gen
 )