DragonMine Z Plus - Super Dragon Balls / Space rework, polish Update!

\*\*Alpha 0.0.4\*\* - \*\*Worldgen:\*\* structure spread fix — DragonMineZ's unique structures no longer spawn pinned to the outer edge of \`structureMaxDistanceFromSpawn\` when \`structureMinDistanceBetween\` is large; the search now covers the whole configured distance band. Toggle: \`worldgen.structureTailFromMinDistance\` (default on). - \*\*HBTC:\*\* new \`hbtc.requireKey\` toggle (default on) — turn off for keyless, time-limited-only chambers; admin commands regrouped under \`time\`/\`cooldown\` and default to the executing player; time budget now drains once per second (perf). - \*\*Instant Transmission:\*\* optional Ki-cost override — \`it.costOverrideEnabled\` replaces the per-use cost with \`costFlatBase + floor(costKiPerBlock × distance)\`; the cross-dimension surcharge still applies on top. Requires \*\*DragonMineZ 2.1.1+\*\* on Minecraft 1.20.1 (Forge).