TestSuite: added tools/win32_open_with_vs.cmd but it doesn't work too great.

Author: ocornut

imgui_test_suite/tools/win32_open_with_vs.cmd

@@ -0,0 +1,9 @@
+@REM Pass to imgui_test_suite.exe with '-fileopener win32_open_with_vs.cmd' or use own script.
+@REM Unfortunately this:
+@REM - use the first/any instance of VS IDE, rather than last used.
+@REM - doesn't seem to support opening at a given line.
+@REM We are printing file/line in the Debug Output console to facilitate double-clicking into the line.
+
+"C:\Program Files\Microsoft Visual Studio\2022\Community\Common7\IDE\devenv.exe" /edit "%1"
+@REM "%DevEnvDir%\devenv.exe" /edit "%1"
+