✨ New Features

• Zombies Flee Explosions — when any creeper ignites (naturally, with flint‑and‑steel, or thrown by a zombie), every zombie within 7 blocks runs away at 1.25× speed until it reaches a safe 9‑block distance, then stops. They track the creeper's live position (not its landing point), so zombies also flee when a creeper ignites on its own. Fleeing outranks chasing — zombies never run toward the blast to chase you.
• Creeper Throw Range Limit — zombies only throw a carried creeper when the target is within creeperThrowRangeHorizontal (default 24 blocks) and creeperThrowRangeVertical (default 32). Out of range? They keep carrying and chase you until you're in range. The emergency ignite‑throw is never range‑limited (self‑preservation always wins).
• Ignite Reaction Delay — when the creeper on their back ignites, zombies pause for 0.5 seconds (creeperIgniteThrowDelay, default 10 ticks) before throwing — no more instant fling, just a panicked zombie and a lit fuse.
• Drowned Spawn on Rainy Days — during rain under open sky (non‑dry biomes), drowned have a drownedRainChance (default 15%) chance to replace zombie spawns, carrying vanilla tridents / fishing rods / nautilus shells.
• Spawn Amount Scales with Difficulty — difficultyScaling (default on) multiplies horde and rainy‑drowned chances by the difficulty factor: Peaceful ×0 / Easy ×0.75 / Normal ×1.0 / Hard ×1.5. Hard mode is hard.
• Wood Fences Breakable — all 11 wood fence variants join the default breakable list, so zombies can tear through your fence line too.

🛠 Fixes

• Fixed creeper AI stuck — creeper AI is no longer disabled while carried (consistent with skeletons); instead the creeper is thrown after the ignite delay and dismounts instantly on damage. No more frozen floating creepers.