- More code cleanup and codestyle updates

- Fixed some possible nullref exceptions
- Methods signatures now have up to 3 parameters before breakaing down each parameter in a separate line
- Method invocations have the same rule, except the first parameter will be in the same line as the invocation to prevent some ugliness when passing lambas as arguments
- Applied many more codestyles
- Extensions folder fully reformatted

src/NadekoBot/Common/JsonConverters/Rbga32Converter.cs

@@ -8,25 +8,17 @@ namespace NadekoBot.Common.JsonConverters;
 public class Rgba32Converter : JsonConverter<Rgba32>
 {
     public override Rgba32 Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
-    {
-        return Rgba32.ParseHex(reader.GetString());
-    }
+        => Rgba32.ParseHex(reader.GetString());
 
     public override void Write(Utf8JsonWriter writer, Rgba32 value, JsonSerializerOptions options)
-    {
-        writer.WriteStringValue(value.ToHex());
-    }
+        => writer.WriteStringValue(value.ToHex());
 }
     
 public class CultureInfoConverter : JsonConverter<CultureInfo>
 {
     public override CultureInfo Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
-    {
-        return new(reader.GetString());
-    }
+        => new(reader.GetString());
 
     public override void Write(Utf8JsonWriter writer, CultureInfo value, JsonSerializerOptions options)
-    {
-        writer.WriteStringValue(value.Name);
-    }
+        => writer.WriteStringValue(value.Name);
 }