Move docs package to moox repo, add PACKAGES.md

[adrolli]

Move the docs package to moox/packages/docs and add the PACKAGES.md file with following table:

Package	Repo (Branch)	Stability	Scope	... more features
moox/core	moox	Stable	No	...

Repos

• moox (bpnm branch for example)
• pro
• web
• intra

Stability

• stable
• stale
• experimental
• alpha
• beta
• idea
• obsolete

Scopes and other features

• Yes
• No
• Todo