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/releases/list.go

@@ -35,7 +35,7 @@ func RunReleasesList(_ stdctx.Context, cmd *cli.Command) error {
 	ctx.Ensure(context.CtxRequirement{RemoteRepo: true})
 
 	releases, _, err := ctx.Login.Client().ListReleases(ctx.Owner, ctx.Repo, gitea.ListReleasesOptions{
-		ListOptions: ctx.GetListOptions(),
+		ListOptions: flags.GetListOptions(),
 	})
 	if err != nil {
 		return err