SDK: "Installer" (or better "SDK Package Manager") should be the key component

Currently SDK Project concept proposal https://github.com/openhwgroup/core-v-docs/blob/master/program/Project%20Descriptions%20and%20Plans/SDK/sdk-project-concept.md contains the "installer" component at the end of the list, while according to "key objectives" it should be the main one and the first one.

Moreover, "Installer" assumes "one time" interaction, that cuts the experience dramatically. But in reality, "S" that means "Software" implies continuous updates. So, it should be a "Package Manager" to form the corresponding viewpoint for requirements gathering.