This PR aims to spark the retirement of a questionable pattern I have found all over our code base. I will illustrate how this pattern encourages code duplication, lacks type safety, requires documentation and can be prone to bugs.
```
std::map<std::string, Object> mMap; // Stored in all lowercase for a case-insensitive lookup
std::string lowerKey = Misc::StringUtils::lowerCase(key);
mMap.emplace(lowerKey, object);
std::string lowerKey = Misc::StringUtils::lowerCase(key);
mMap.find(lowerKey);
mMap.find(key); // Not found. Oops!
```
An alternative approach produces no such issues.
```
std::unordered_map<std::string, Object, Misc::StringUtils::CiHash, Misc::StringUtils::CiEqual> mMap;
mMap.emplace(key, object);
mMap.find(key);
```
Of course, such an alternative will work for a `map` as well, but an `unordered_map` is generally preferable over a `map` with these changes because we have moved `lowerCase` into the comparison operator.
In this PR I have refactored `Animation::mNodeMap` accordingly. I have reviewed and adapted all direct and indirect usage of `Animation::mNodeMap` to ensure we do not change behaviour with this PR.
Currently, we use a peculiar mapping of ESM classes by their std::type_info::name. This mapping is an undefined behaviour because std::type_info::name is strictly implementation defined. It could return a non-unique value on some platforms. With this PR we use the unsigned int sRecordId of the ESM class as a more efficient lookup type that does not build on undefined behaviour. We can expect marginally faster save-game loading with these changes as well.
1. Move weapon types behaviour from switches to the table (should allow
us to de-hardcode weapon types later)
2. Gereralize bones injection to actors skeletons (instead of using the
hardcoded xbase_anim_sh.nif)
The pointer to the LightListCallback is now stored in the Animation, which eliminates the need for dynamic_cast. Also, when the object root is recreated, the previously used LightListCallback will be reused, so we no longer need the objectRootReset() notifier.
Finally, there was a bug when saving and reloading the game, the getIgnoredLightSources() were not being set, as the ActorAnimation constructor completes before the NpcAnimation sets the ObjectRoot. This was solved by creating the LightListCallback in advance in the Animation constructor.
