func NewFileSystem() *FileSystem {
	return &FileSystem{options: NewOptions()}
}
NewFileSystem creates a new default FileSystem.  This will set the options options.AccountName and
options.AccountKey with the env variables AZURE_STORAGE_ACCOUNT and AZURE_STORAGE_ACCESS_KEY respectively.
package azure
import (
	"errors"
	"fmt"
	"net/url"
	"os"
	"path"
	"regexp"
	"strings"
	"github.com/c2fo/vfs/v6"
	"github.com/c2fo/vfs/v6/backend"
	"github.com/c2fo/vfs/v6/utils"
)
const Scheme = "https"
const Name = "azure"
const errNilFileSystemReceiver = "azure.FileSystem receiver pointer must be non-nil"
type FileSystem struct {
	options *Options
	client  Client
}