feat(drivers): alias a new storage with multi path (close #3248)

drivers/alias/meta.go

@@ -0,0 +1,27 @@
+package alias
+
+import (
+	"github.com/alist-org/alist/v3/internal/driver"
+	"github.com/alist-org/alist/v3/internal/op"
+)
+
+type Addition struct {
+	// Usually one of two
+	// driver.RootPath
+	// define other
+	Paths string `json:"paths" required:"true" type:"text"`
+}
+
+var config = driver.Config{
+	Name:        "Alias",
+	LocalSort:   true,
+	NoCache:     true,
+	NoUpload:    true,
+	DefaultRoot: "/",
+}
+
+func init() {
+	op.RegisterDriver(func() driver.Driver {
+		return &Alias{}
+	})
+}