Refund expensive POH decoration items when removed + fix tiny xp and hotspot issues

What has been done in this MR?

• Made the following hotspots refund their non-plank items when torn down: any quest item, any guild trophy, any armor stand. This would technically include the mounted glory, but since ours is inauthentic and consequently lacks a proper "Remove" option, I propose a different solution instead: #1922

• To make this possible, added a new field in Decoration.java called refundItems, giving a list of items to be refunded when the object is removed. Updated API definitions within that file as needed. Make experience always an int, because it always is but the previous function signatures mixed ints and doubles, which only worked out for reasons of coincidence.

• To make the above possible, converted all variable-argument Item definitions to single-position array definitions. To make doing that easier in my text editor, completely reformatted whitespace in Decoration.java (this was needed for text-editor reasons only, but the result is nice, I'd say).

• Removed decorations and hotspots for "Menagerie" rooms, which seem to be inauthentic OSRS-only

• Changed the following hotspots to be recursive: Decoration (e.g. in throne room, dining room, etc), Tool space (workshop), Wall chart (study)

• Corrected xp for all crafting tables (source: https://runescape.wiki/w/Crafting_table_1 through _4). Known issue that is not in scope: you can immediately build crafting table 4 because "Upgrade" is not implemented

• Fixed #1556

• Fixed #1832, also audit and correct xp for the other kinds of this furniture piece using the provided source

• Audited and corrected xp awards for items requiring planks, which Arios sometimes awarded 30 rather than 29 ea of: https://runescape.wiki/w/Crude_wooden_chair https://runescape.wiki/w/Wooden_chair https://runescape.wiki/w/Rocking_chair https://runescape.wiki/w/Wooden_workbench (if you cannot test chairs, that's because of #1841)

Sources:

• getting quest items and guild trophies back: https://runescape.wiki/w/Quest_hall?oldid=861049
• getting glory back: https://runescape.wiki/w/Amulet_of_Glory\_(mounted)?oldid=3382741
• getting armor back: https://runescape.wiki/w/Skill_hall?oldid=855674
• before you ask, monster heads and big fish cannot be gotten back, as explicitly stated here: https://oldschool.runescape.wiki/w/Kalphite_Queen_head\_(mounted) https://oldschool.runescape.wiki/w/Mounted_shark

What should testers check?

• Hotspots continue to work normally
• You get the above-mentioned items back when you remove them
• For hotspots that became recursive, building one now builds all
• Correct xp is awarded

• I have tested these changes thoroughly.
• I used the relevant Zaros tool for any JSON edits where possible, and have attached screenshots of any changes.