feat: MiniMessage locales on Paper + cloplib entity protection

[noaskers]

Two commits, on top of the fork's master.

1. MiniMessage locales on Paper

Paper 26.2 ships Adventure 5, which drops the ClickEvent.Action enum MineDown compiles against, so MineDown can no longer format messages there. Formatting moves behind a MessageFormatter interface with two implementations: MineDownFormatter for Bukkit/Fabric and MiniMessageFormatter for Paper, backed by a parallel set of MiniMessage locale files.

The formatter in use decides which locale file loads, and switching markup format rewrites the existing messages file rather than leaving a second one behind. A malformed messages file falls back to the bundled locale instead of failing to enable the plugin.

-Dhuskclaims.skipFabric=true leaves the Fabric projects out of the build, so a Loom failure doesn't break configuration for unrelated tasks.

2. cloplib Paper listener for entity protection

Supersedes WiIIiam278#504 — this replaces that PR's reflection with a native listener.

Explosions. cloplib resolves the damager before the cause, and getPlayerSource() unwraps projectile shooters and passengers, so a blast attributable to a player is checked against player_damage_player rather than explosion_damage_entity. That flag is on by default, so end crystals detonated just outside a claim boundary killed players and destroyed armour stands inside it. Checked at LOW, ahead of cloplib, so the explosion flag applies regardless of attribution.

Knockback. Spears use the piercing_weapon component, which applies knockback without dealing damage, so no damage event fires and an armour stand can be shoved out of a claim. cloplib 2.0.13 handles EntityPushedByEntityAttackEvent natively in its new paper module; PaperListener implements PaperEntityDamageListener and inherits the handler — no reflection.

Closes WiIIiam278#479, WiIIiam278#461, WiIIiam278#497, WiIIiam278#297.

Dependency note

Requires cloplib 2.0.13, from noaskers/ClopLib feat/paper-module-entity-fixes (both bug fixes + the new paper module). That has to merge and publish before this builds on CI. cloplib_version defaults to 2.0.12 in gradle.properties so existing builds are unaffected; test against a local publish with:

./gradlew :paper:build -Pcloplib_version=<local version>

cloplib-paper is an implementation rather than compileOnly dependency — verified: with compileOnly the relocated PaperEntityDamageListener class is absent from the shaded jar, and PaperListener implements it, so the server would fail at class load.

Testing

:common:test, :bukkit:build, :paper:build all pass — 16 tests, 0 failures.