feat: multiple search indexes (#2514)

* refactor: abstract search interface

* wip: ~

* fix cycle import

* objs update hook

* wip: ~

* Delete search/none

* auto update index while cache changed

* db searcher

TODO: bleve init issue

cannot open index, metadata missing

* fix size type

why float64??

* fix typo

* fix nil pointer using

* api adapt ui

* bleve: fix clear & change struct

server/handles/user.go

@@ -11,7 +11,7 @@ import (
 )
 
 func ListUsers(c *gin.Context) {
-	var req common.PageReq
+	var req model.PageReq
 	if err := c.ShouldBind(&req); err != nil {
 		common.ErrorResp(c, err, 400)
 		return