Create a cookbook for productivity & github related work

[galargh]

actions like:

• https://gist.github.com/guseggert/b9622b794b0886d66e8fbf8f234ca709
• https://github.com/ipfs/go-ipfs/pull/8756

Will probably happen often, having one location to share our recipe would save us time.

See also question in #ip-productivity about merge policies

Create a folder for how-tos (in notion for example)

[galargh]

We're gathering things like that in https://www.notion.so/pl-strflt/Hows-d023055c5b074d1eaf1e4b6705580c93 now