Fixed some aliases and reworked namespaces

src/NadekoBot/_common/CmdStrings.cs

@@ -0,0 +1,17 @@
+#nullable disable
+using Newtonsoft.Json;
+
+namespace NadekoBot.Common;
+
+public class CmdStrings
+{
+    public string[] Usages { get; }
+    public string Description { get; }
+
+    [JsonConstructor]
+    public CmdStrings([JsonProperty("args")] string[] usages, [JsonProperty("desc")] string description)
+    {
+        Usages = usages;
+        Description = description;
+    }
+}