More Ways to Get XP

[1.1.0]

Added

• /xp:xpform set is now fully functional. Previously this just showed a message telling you to use manual commands instead... now it's a proper form: pick a built-in event from a list, then toggle it on/off and set its min/max XP directly.
• In-game documentation book. Use the xpform:book item to open a friendly, in-game guide covering what the addon does, how commands work, how to find a block/entity's typeId, and more.
• The documentation book is automatically given once to the first admin/operator who joins the world (only if it hasn't been given to anyone before). If their hotbar is full, it's dropped on the ground next to them instead.
• New shortcut item: xpform:set, opens the same form as /xp:xpform set.
• Every action (add/edit/delete a custom event, edit a built-in event) now gives you a clear confirmation message in chat, or an error message if something's wrong (e.g. typing letters instead of numbers for MIN/MAX).
• A heads-up note now appears when editing any_block, hitting_entity, or killing_entity in /xp:xpform set, reminding you that these affect every block/entity.

Fixed

• Custom events created via /xp:xpform add now work immediately. Previously, a newly added custom event sometimes wouldn't actually give XP until the world was reloaded.
• Fixed editing a custom event through /xp:xpform own not saving the new MIN/MAX values correctly.
• XP orbs now spawn at the center of the target block instead of right at its corner/edge.

Changed

• Internal code has been reorganized into smaller, focused files. This doesn't change any behavior or require any action from players, it just makes future updates faster and safer to ship.