* [Feature] Add Heroic Strikethrough to NPC Scaling
# Notes
- Adds Heroic Strikethrough support to NPC scaling.
- Cleans up `std::stoul` to use `Strings::ToUnsignedInt` since recent changes.
- Sets default values to sane values and removes support for `NULL` values.
* Update 2023_03_04_npc_scale_global_base_heroic_strikethrough.sql
* [Scaling] Add support for zone ID and instance version to NPC Scaling
# Notes
- Adds `zone_id` and `instance_version` to `npc_scale_global_base` table to allow for zone and version-specific scaling.
- Defaults back to `zone_id` of `0` and `instance_version` of `0` for global scaling.
- Scaling load precedence is as follows:
- `zone_id` of current zone and `instance_version` of current instance
- `zone_id` of current zone and `instance_version` of `0`
- `zone_id` of `0` and `instance_version` of `0`
* Remove debug comment.
* Use zone not NPC.
* SQL
* [Quest API] Default ScaleNPC to always scale.
# Notes
- ScaleNPC will now always override stats, with the option to override special abilities.
* Update npc_scale_manager.h
# Perl
- Add `$npc->ScaleNPC(level, always_scale_stats)`.
- Add `$npc->ScaleNPC(level, always_scale_stats, always_scale_special_abilities)`.
# Lua
- Add `npc:ScaleNPC(level, always_scale_stats)`.
- Add `npc:ScaleNPC(level, always_scale_stats, always_scale_special_abilities)`.
# Notes
- Allows operators to not have to set stats to 0 in order for scaling to kick in when scripting.
- Special ability override is separate in case you don't want to override some inherent special abilities the NPC has from a script or otherwise.
