How to install a skill package a user hands over (.skill/.zip/.tar.gz), and how to write a new skill into this runtime so it is listed, enabled and usable. Use when the user says 安装这个技能/装一下这个 SKILL/install this skill, uploads a skill package, or asks MOZI to 做一个技能/写一个 SKILL/把这个流程存成技能 — anything that ends with a skill living inside MOZI.
