Remove pagination from context (#807)

Pagination related flags now write directly to ListOption struct and enforce non negative numbers.
Flag tests were added to cover the validation

Reviewed-on: https://gitea.com/gitea/tea/pulls/807
Reviewed-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: TheFox0x7 <thefox0x7@gmail.com>
Co-committed-by: TheFox0x7 <thefox0x7@gmail.com>

cmd/repos/search.go

@@ -109,7 +109,7 @@ func runReposSearch(_ stdctx.Context, cmd *cli.Command) error {
 	}
 
 	rps, _, err := client.SearchRepos(gitea.SearchRepoOptions{
-		ListOptions:          teaCmd.GetListOptions(),
+		ListOptions:          flags.GetListOptions(),
 		OwnerID:              ownerID,
 		IsPrivate:            isPrivate,
 		IsArchived:           isArchived,