kairoengine/inventory: Items and inventory library

jamesperet 7779a29d05 Initial commit		3 gadi atpakaļ
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Editor	7779a29d05 Initial commit	3 gadi atpakaļ
Editor.meta	7779a29d05 Initial commit	3 gadi atpakaļ
Runtime.meta	7779a29d05 Initial commit	3 gadi atpakaļ