feat: Adds tidy option for serialization. Codegens ballotbox. Fixes pooled timer leaking (#681)

* Fixes pooled timer leaking
* Fixes `[dumptimers` command so it outputs properly, adds spacing, and stacktraces
* Adds `[Tidy]` for serializing Lists. This will remove deleted entities during world save before serializing the list.
* Adds helpers for managing Lists/Sets/Dictionaries


### New API

```cs
// Creates the list if it is null, then adds
Utility.Add(ref list, value);
Utility.Add(ref set, value);
Utility.Add(ref dict, key, value);

// Nulls the variable if the count is zero
Utility.Remove(ref list, value);
Utility.Remove(ref set, value);
Utility.Remove(ref dict, key);

// Marks entity as dirty in addition to doing the action
entity.Add(list, value);
// Marks entity as dirty, and will create list if it doesn't exist
entity.Add(ref list, value);

// Marks entity as dirty in addition to doing the action
entity.Remove(list, value);
// Marks entity as dirty, and will null the list count is zero
entity.Remove(ref list, value);
```


### Updates to [dumptimers
<img width="825" alt="Screen Shot 2021-08-14 at 2 55 10 AM" src="https://user-images.githubusercontent.com/3953314/129442449-ccf7fe14-29d6-4f3f-9366-c8eb7b9828a7.png">

Projects/SerializationGenerator/SerializableEntityGeneration/SerializableEntityGeneration.Class.cs

@@ -182,8 +182,8 @@ namespace SerializationGenerator
                 var attrCtorArgs = serializableFieldAttr.ConstructorArguments;
 
                 var order = (int)attrCtorArgs[0].Value!;
-                var getterAccessor = Helpers.GetAccessibility(attrCtorArgs[1].Value!.ToString());
-                var setterAccessor = Helpers.GetAccessibility(attrCtorArgs[2].Value!.ToString());
+                var getterAccessor = Helpers.GetAccessibility(attrCtorArgs[1].Value?.ToString());
+                var setterAccessor = Helpers.GetAccessibility(attrCtorArgs[2].Value?.ToString());
                 var virtualProperty = (bool)attrCtorArgs[3].Value!;
 
                 if (fieldOrPropertySymbol is IFieldSymbol fieldSymbol)

Projects/SerializationGenerator/SerializableEntityGeneration/SerializableEntityGeneration.DeserializeMethod.cs

@@ -37,6 +37,7 @@ namespace SerializationGenerator
             var genericReaderInterface = compilation.GetTypeByMetadataName(SymbolMetadata.GENERIC_READER_INTERFACE);
 
             source.GenerateMethodStart(
+                "        ",
                 "Deserialize",
                 Accessibility.Public,
                 isOverride,
@@ -120,7 +121,7 @@ namespace SerializationGenerator
                 source.AppendLine($"{indent}Timer.DelayCall({afterDeserialization.Name});");
             }
 
-            source.GenerateMethodEnd();
+            source.GenerateMethodEnd("        ");
         }
     }
 }

Projects/SerializationGenerator/SerializableEntityGeneration/SerializableEntityGeneration.Property.cs

@@ -43,6 +43,7 @@ namespace SerializationGenerator
                 );
 
             const string indent = "        ";
+            const string innerIndent = "                ";
             const string propertyIndent = "            ";
 
             var propertyAccessor = setter > getter ? setter : getter;
@@ -59,7 +60,6 @@ namespace SerializationGenerator
 
                 // Setter
                 source.GeneratePropertySetterStart(propertyIndent, false, setterAccessor.Value);
-                const string innerIndent = "                ";
                 source.AppendLine($"{innerIndent}if (value != {fieldName})");
                 source.AppendLine($"{innerIndent}{{");
                 source.AppendLine($"{innerIndent}    {fieldName} = value;");

Projects/SerializationGenerator/SerializableEntityGeneration/SerializableEntityGeneration.SerialCtor.cs

@@ -32,6 +32,7 @@ namespace SerializationGenerator
             var serialType = (ITypeSymbol)compilation.GetTypeByMetadataName("Server.Serial");
 
             source.GenerateConstructorStart(
+                "        ",
                 className,
                 Accessibility.Public,
                 new []{ (serialType, "serial") }.ToImmutableArray(),
@@ -44,7 +45,7 @@ namespace SerializationGenerator
             SetTypeRef(typeof({className}));");
             }
 
-            source.GenerateMethodEnd();
+            source.GenerateMethodEnd("        ");
         }
     }
 }

Projects/SerializationGenerator/SerializableEntityGeneration/SerializableEntityGeneration.SerializeMethod.cs

@@ -33,6 +33,7 @@ namespace SerializationGenerator
             var genericWriterInterface = compilation.GetTypeByMetadataName(SymbolMetadata.GENERIC_WRITER_INTERFACE);
 
             source.GenerateMethodStart(
+                "        ",
                 "Serialize",
                 Accessibility.Public,
                 isOverride,
@@ -61,7 +62,7 @@ namespace SerializationGenerator
                 );
             }
 
-            source.GenerateMethodEnd();
+            source.GenerateMethodEnd("        ");
         }
     }
 }