Vendor fetch default option to unzip libraries by default, with c3c command to zip/unzip c3l files

[joshring]

Tooling like LSPs would benefit from being able to read library code more easily, so suggesting:

• vendor fetch default option to unzip libraries by default
• A c3c command to zip/unzip c3l files

[lerno]

vendor fetch will not unzip by default. However, zip/unzip files in a project can be added.

[LowByteFox]

There could possibly be a flag to unzip the fetched c3l, for example --unpack.