added champion challenge

What have you done in this MR?

• Implemented champions challenge, also
• Added boss restriction according to the table below.
• SendNews on globalchat when player drop scroll. (1/5000)
• Banners after every kill inside Champion's guild. (This has been added thanks to mr. Skelsoft @skelsoft)
• DropHandler written by (phil lips @cringeandrunny), Thank you.

Are there any tricky things testers should keep an eye out for?

• No
• Yes, as follows:

[]Table[]

How to play: Use the scroll on npc larxus to begin event, then go through the metal doors to start fight with the boss.

Scroll Item ID	NPC ID	Name	XP/ Scroll	Restrictions
Items.CHAMPION_SCROLL_6798	3057	EARTH_WARRIOR_SCROLL	432 XP	NO PRAYER
Items.CHAMPION_SCROLL_6799	3059	GHOUL_SCROLL	400 XP	ONLY WEAPONS
Items.CHAMPION_SCROLL_6800	3058	GIANT_SCROLL	280 XP	ONLY MELEE
Items.CHAMPION_SCROLL_6801	3060	GOBLIN_SCROLL	128 XP	ONLY MAGE
Items.CHAMPION_SCROLL_6802	3061	HOBGOBLIN_SCROLL	232 XP	NO MELEE
Items.CHAMPION_SCROLL_6803	3062	IMP_SCROLL	160 XP	NO SPEC WEP
Items.CHAMPION_SCROLL_6804	3063	JOGRE_SCROLL	480 XP	NO RANGE
Items.CHAMPION_SCROLL_6805	3064	LESSER_DEMON_SCROLL	592 XP	ONLY EQUIPMENT
Items.CHAMPION_SCROLL_6806	3065	SKELETON_SCROLL	232 XP	ONLY RANGE
Items.CHAMPION_SCROLL_6807	3066	ZOMBIE_SCROLL	240 XP	NO MAGE

• I have tested these changes thoroughly.

• This requires extra testing due to changes to architecture or other similarly risky changes.

• I added drop table using the Thanos Tool Zaros for any JSON edits where possible, and have attached screenshots of any changes.

• I acknowledge that this contribution will be released under the AGPL license.