add GetAll for ids filtering to BaseClient

Pilz.Net/Api/Client/BaseClient.cs

@@ -21,6 +21,16 @@ public abstract class BaseClient<T>(IApiClient client) : IBaseClient<T> where T
         })).EnsureOk().Items;
     }
 
+    public virtual async Task<IEnumerable<T>> GetAll(int[] ids, int offset, int amount)
+    {
+        return (await client.SendRequest<GeneralItemMessages<T>.Items>(ApiEndpoint, HttpMethod.Get, new ApiParameterCollection
+        {
+            ["offset"] = offset,
+            ["amount"] = amount,
+            ["ids"] = string.Join(',', ids),
+        })).EnsureOk().Items;
+    }
+
     public virtual async Task<T> Get(int id)
     {
         return (await client.SendRequest<GeneralItemMessages<T>.Item>($"{ApiEndpoint}/{id}", HttpMethod.Get)).EnsureOk().Item;