try to fix search file with ./

[KignorChan]

I'm trying fix issue #26956, which can't find files starting with ./ on MacOS. I try to remove './' if it is found in search path. For example, to find 'controller.js' in current directory, if I input './controller.js', it will search like 'controller.js'. So I use "value.replace('./', '')" to remove './'.

[chrmarti]

Hi @KignorChan, thanks for your contribution!

Could you move the change to the openFileHandler that is call from the openAnythingHanlder, e.g. here: https://github.com/Microsoft/vscode/blob/6f57929bdb86c72619f36bc9e5537ca9528f1850/src/vs/workbench/parts/search/browser/openFileHandler.ts#L147

Also add a check for startsWith(value, '.' + paths.nativeSep) (use the strings module's startsWith) and then just remove the first two characters.