Add admin component (#6928)

* init version

* relocate

* add s3 bucket link

* refactor handlers into weed/admin folder

* fix login logout

* adding favicon

* remove fall back to http get topology

* grpc dial option, disk total capacity

* show filer count

* fix each volume disk usage

* add filers to dashboard

* adding hosts, volumes, collections

* refactor code and menu

* remove "refresh" button

* fix data for collections

* rename cluster hosts into volume servers

* add masters, filers

* reorder

* adding file browser

* create folder and upload files

* add filer version, created at time

* remove mock data

* remove fields

* fix submenu item highlighting

* fix bucket creation

* purge files

* delete multiple

* fix bucket creation

* remove region from buckets

* add object store with buckets and users

* rendering permission

* refactor

* get bucket objects and size

* link to file browser

* add file size and count for collections page

* paginate the volumes

* fix possible SSRF

https://github.com/seaweedfs/seaweedfs/pull/6928/checks?check_run_id=45108469801

* Update weed/command/admin.go

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update weed/command/admin.go

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* fix build

* import

* remove filer CLI option

* remove filer option

* remove CLI options

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

weed/admin/dash/middleware.go

@@ -0,0 +1,27 @@
+package dash
+
+import (
+	"net/http"
+
+	"github.com/gin-contrib/sessions"
+	"github.com/gin-gonic/gin"
+)
+
+// RequireAuth checks if user is authenticated
+func RequireAuth() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		session := sessions.Default(c)
+		authenticated := session.Get("authenticated")
+		username := session.Get("username")
+
+		if authenticated != true || username == nil {
+			c.Redirect(http.StatusTemporaryRedirect, "/login")
+			c.Abort()
+			return
+		}
+
+		// Set username in context for use in handlers
+		c.Set("username", username)
+		c.Next()
+	}
+}