feat: support qbittorrent (close #3087 in #3333)

* feat(qbittorrent): authorization and logging in support

* feat(qbittorrent/client): support `AddFromLink`

* refactor(qbittorrent/client): check authorization when getting a new client

* feat(qbittorrent/client): support `GetInfo`

* test(qbittorrent/client): update test cases

* feat(qbittorrent): init qbittorrent client on bootstrap

* feat(qbittorrent): support setting webui url via gin

* feat(qbittorrent/client): support deleting

* feat(qbittorrent/client): parse `TorrentStatus` enum when unmarshalling json in `GetInfo()`

* feat(qbittorrent/client): support getting files by id

* feat(qbittorrent): support adding qbittorrent tasks via gin

* refactor(qbittorrent/client): return a `Client` interface in `New()` instead of `*client`

* refactor: task handle

* chore: fix typo

* chore: change path

---------

Co-authored-by: Andy Hsu <i@nn.ci>

internal/qbittorrent/qbittorrent.go

@@ -0,0 +1,23 @@
+package qbittorrent
+
+import (
+	"github.com/alist-org/alist/v3/internal/conf"
+	"github.com/alist-org/alist/v3/internal/setting"
+	"github.com/alist-org/alist/v3/pkg/task"
+)
+
+var DownTaskManager = task.NewTaskManager[string](3)
+var qbclient Client
+
+func InitClient() error {
+	var err error
+	qbclient = nil
+
+	url := setting.GetStr(conf.QbittorrentUrl)
+	qbclient, err = New(url)
+	return err
+}
+
+func IsQbittorrentReady() bool {
+	return qbclient != nil
+}