[Revscriptsys] RevNpcSys version 1.0 (lua npcs / NpcType / new npc system)

[EvilHero90]

Pull Request Prelude

• [x] I have followed proper The Forgotten Server code styling.
• [x] I have read and understood the contribution guidelines before making this PR.
• [x] I am aware that this PR may be closed if the above-mentioned criteria are not fulfilled.

Changes Proposed

Finaly introducing lua npcs with an oop based new npc system. Both systems lua and xml are now based on NpcType. This pr doesn't change anything on the already existing xml npcs and jiddos npc system, that's still valid and functional. Fixed a memory leak regarding xml npcs. I've included 2 example npcs in data/npc/lua/#test.lua

Issues addressed: none

[EvilHero90]

This is a good base for version 1.0 Time to review and merge.

[EvilHero90]

Really cool to have Lua NPCs, it's one step further away from XML. I don't have enough knowledge to do a proper review here though.

Feel free to just review the .cpp/h changes, those are mostly the critical changes, we still have the old npc system if something shouldn't correctly work at some point I can just push fixes and increase the version

[ranisalt]

Let's go 🚀