Fixes serialization/deserialization edge cases with BitArray. If you use BitArray, you will need to migrate.
1. Change the type in the migration JSON file (if there is one) from `BitArray` to `byte[]` for all the versions you need to migrate.
2. Then in the `MigrateFrom`, use the following function to convert the field from a byte[] back to the BitArray.
Example Migration JSON:
```json
{
"name": "RestrictedSpells",
"type": "byte[]",
"rule": "ArrayMigrationRule",
"ruleArguments": [
"byte",
"PrimitiveTypeMigrationRule",
""
]
},
```
Migration function to use in MigrateFrom:
```cs
public static BitArray MigrateBitArray(byte[] data, int bitLength) => new(data) { Length = bitLength };
```
Example use:
```cs
private void MigrateFrom(V0Content content)
{
// ... deserialize
_restrictedSpells = content.RestrictedSpells.MigrateBitArray(SpellRegistry.Types.Length);
_restrictedSkills = content.RestrictedSkills.MigrateBitArray(SkillInfo.Table.Length);
// ... rest of deserialize
}
```
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