Add getMimeType($ext) function in class Response

[joanhey]

I'm creating a static file class for Adapterman.
First I tried some code creating a StaticPreCompressed middleware for Webman (later I'll send it).
That check the Accept-Encoding to try to serve pre-compressed .br and .gz files first, and serve correct headers.

But always download the file, even with the Content-Type header, because the middleware add it, but we change the file to serve adding .br or .gz. And this code search for .br or .gz extension:
if (!isset($headers['Content-Disposition']) && !isset(self::$mimeTypeMap[$extension]))

So I refactored the code, and added the method for not repeat the code in the middleware again.

[joanhey]

Code example for compressed static files, than now always download without this change:

    #[Get('/static/{path}')]
    public function files($request, $path)
    {
        //return new Response()->withFile('/data/static/' . $path);

        //$response = $handler($request);

        $response = new Response();
        //$path = $request->path();
        $path = "/data/static/$path";
        // Access to files beginning with. Is prohibited
        if (str_contains($path, '/.')) {
            return response('<h1>403 forbidden</h1>', 403);
        }
        if (!is_file($path)) { // in middleware public_path().$path
            return response('<h1>404 Not Found</h1>', 404);
        }

        $headers = [];
        $ext = pathinfo($path, PATHINFO_EXTENSION);
        
        if($encoding = $request->header('accept-encoding', '')) {
            if(str_contains($encoding, 'br') && is_file("$path.br")) {
                $path .= '.br';
                $headers = ['Content-Encoding' => 'br',
                            'Vary' => 'Accept-Encoding'];

            } elseif (str_contains($encoding, 'gzip') && is_file("$path.gz")) {
                $path .= '.gz';
                $headers = ['Content-Encoding' => 'gzip',
                            'Vary' => 'Accept-Encoding'];
            }
            
            //$headers['Content-Type'] = $response::$mimeTypeMap[$ext];// ?? 'application/octet-stream';
            $headers['Content-Type'] = $response->getMime($ext);
        }

        //return response(var_dump($headers));
        // Add HTTP headers
        $response->withHeaders($headers
            //+ [
            //'Cache-Control'                    => 'max-age=31536000, immutable',
            //'Access-Control-Allow-Origin'      => '*',
            //'Access-Control-Allow-Credentials' => 'true',
            //]
            )
            ->file($path);
        
        return $response;

Test it in the controller, but we have ready a StaticPreCompressed.php midleware for Webman.