Improve profile for Organizations (#27982)

Fixes some problems in #27955:
- autofocus of the search box
before:
if access the home page will jump to the search box

![image](7f100e8d-2bd6-4563-85ba-d6008ffc71d7)
after:
will not jump to the search box

![image](9aab382c-8ebe-4d18-b990-4adbb6c341ad)

- incorrect display of overview tab
before:

![image](b24c79e8-9b79-4576-9276-43bd19172043)
after:

![image](7aab5827-f086-4874-bd84-39bd81b872f3)

- improve the permission check to the private profile repo
In #26295, we simply added access control to the private profile.
But if user have access to the private profile repo , we should also
display the profile.

- add a button which can jump to the repo list?
I agree @wxiaoguang 's opinion here:
https://github.com/go-gitea/gitea/pull/27955#issuecomment-1803178239
But it seems that this feature is sponsored. 
So can we add a button which can quickly jump to the repo list or just
move profile to the `overview` page?

---------

Co-authored-by: silverwind <me@silverwind.io>

routers/web/user/profile.go

@@ -64,7 +64,7 @@ func userProfile(ctx *context.Context) {
 		ctx.Data["HeatmapTotalContributions"] = activities_model.GetTotalContributionsInHeatmap(data)
 	}
 
-	profileGitRepo, profileReadmeBlob, profileClose := shared_user.FindUserProfileReadme(ctx)
+	profileGitRepo, profileReadmeBlob, profileClose := shared_user.FindUserProfileReadme(ctx, ctx.Doer)
 	defer profileClose()
 
 	showPrivate := ctx.IsSigned && (ctx.Doer.IsAdmin || ctx.Doer.ID == ctx.ContextUser.ID)