feat: add multi-account weixin channel

pkg/channels/weixin_stub.go

@@ -0,0 +1,16 @@
+//go:build omit_weixin
+
+package channels
+
+import (
+	"github.com/YspCoder/clawgo/pkg/bus"
+	"github.com/YspCoder/clawgo/pkg/config"
+)
+
+type WeixinChannel struct{ disabledChannel }
+
+const weixinCompiled = false
+
+func NewWeixinChannel(cfg config.WeixinConfig, bus *bus.MessageBus) (*WeixinChannel, error) {
+	return nil, errChannelDisabled("weixin")
+}