Custom armor and tools fixed, bigger land limits, minion slots and player shops

A batch of land and quality-of-life changes based on player and moderator feedback, plus a real fix for custom armor and tools. Thanks to everyone who kept reporting the gear problem - you were right, and it turned out to be four separate bugs.

Custom armor and tools - actually fixed now

• Tier pickaxes were genuinely worse than plain Netherite. Because of how Minecraft 1.20.5+ handles item stats, writing the Mining Efficiency bonus silently wiped the pickaxe's built-in Attack Damage and Attack Speed. Every tier pickaxe was hitting for 1 damage instead of 5. The Netherite baseline is restored, so a tier pickaxe now hits exactly as hard as Netherite plus its own bonus.
• Mining speed was far too weak to notice. In Minecraft's mining formula a single Efficiency level is worth a lot: Efficiency 5 adds 26 and Efficiency 6 adds 37, while the old top tier added just 6. An ordinary Efficiency 6 pickaxe could out-mine an Astral. Mining Efficiency is now Cobalt 4, Titanium 8, Astral 14, Empyrean 22, Seventh 32 (was 1, 2, 3, 4, 6). An Astral now clearly beats an Efficiency 6 pickaxe, and a Seventh mines close to twice as fast as a plain Efficiency 5 Netherite one.
• The top armor tiers were identical to each other. Vanilla hard-caps Armor at 30 and Toughness at 20, and a full Astral set already hit that ceiling, so Empyrean and Seventh were handing out numbers the game threw away. They now grant bonus max health, which has no cap: for a full set, Titanium +1 heart, Astral +2, Empyrean +4, Seventh +7.
• The anticheat was cancelling fast mining. GrimAC's FastBreak check was blocking block breaks from players with strong mining setups, so the better your gear got, the more your breaks were rejected and the slower you actually mined. It now reports to staff without cancelling anything.
• Gear you already own is upgraded automatically the next time you join. Nothing is removed and nothing is lost.

Land

• The extra parcel limit is up from 3 to 10, so you have a lot more room to expand beyond your first territory.
• Fixed a bug where some parcels could never be bought or claimed by anyone. Territory slots an inactive owner never bought out were getting stuck reserved to their account forever after a reclaim - those are now freed properly, and a one-time cleanup ran for anything already stuck.
• /land trust <player> now asks whether to trust someone on just the parcel you're standing on, or on all your land.
• New /land perm <player> <containers|build|interact> <true|false> lets you restrict what a trusted player can actually do - stop someone from opening your chests without also blocking them from helping you build, for example.

Minions

• You can now buy extra minion slots with in-game coins, on top of the base limit. Same rule as everything else here: real money never buys a higher ceiling than grinding can reach.

Player shops

• New /pshop create <price> - attach a sign to a chest on your own land, hold the item you want to sell, and any player can right-click the sign to buy straight out of your chest. /pshop remove takes it down.