(WIP) refactor: Migrate Lua Engine Bindings from C-API to Sol3

[iThorgrim]

Description

This Pull Request represents a major architectural upgrade of the AzerothCore Lua Engine (ALE), migrating from the raw Lua C-API to Sol3.

The primary goal is to modernize the codebase, improve maintainability and simplify the API for script developers.

What Changed

Before (C-API):

int HasQuest(lua_State* L, Player* player)
{
    uint32 quest = ALE::CHECKVAL<uint32>(L, 2);
    ALE::Push(L, player->IsActiveQuest(quest));
    return 1;
}

After (Sol3):

bool HasQuest(Player* player, uint32 questId)
{
    return player->IsActiveQuest(questId);
}

Measurable Improvements

• Type Safety: Arguments validated at compile-time instead of runtime
• No Manual Stack Manipulation: Eliminated lua_push*, lua_check*, lua_settop, etc.

Key Changes

• Enhanced Hook System:
  • 100+ new PlayerEvent hooks (74-190+)
  • New UnitEvent hooks
  • {...}
• Better Method Registration: Single centralized registration point.

Developer Benefits

• Significantly reduced complexity when adding new methods or hooks.
• Easier debugging with compile-time type checking
• Cleaner, more maintainable codebase

Migration Impact

This is a complete rewrite of the binding layer. The Lua-facing API remains largely compatible, but the internal C++ architecture is completely modernized.

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Description of the PR corrected, reviewed, translated by Claude after a comparison of mod-ale (C API) and mod-ale (Sol3).