move best spawner config & showdown data to resources/data

complacentdevrequested to merge
complacentdev/cobblemon:fuck-assets into main

move best-spawner-config & showdown zip/metadata to resources/data instead of assets, where they should not be

add FileUtils.copyInternalToExternal to move things from internal to, you guessed it, external paths.

tested & working fine 😎

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