add README.md

The original spec is here: https://github.com/bitcoincashorg/bitcoincash.org/blob/master/spec/op_return-prefix-guideline.md, this is already referenced in our version of that file.

add tests, fix build using NodeNext

squash with previous commit...

rerun CI

remove rocksdb features

move to named iterators

Will need to name types for the iterator; -> impl Iterator doesn't work with Group

rerun lint

should be a draft

Note: On Tue Jun 05 2255 23:47:34 this will return imprecise results, but that can be fixed around then.

Personally I think MSG1 makes more sense, but up to yall

reworded the changelog (the purpose really is just fixing it in the browser), otherwise gtg

always refer to master branch in typedoc

fix some typos

Use meaningful component names in live demos

fix social thumbnail tagline

remove copyright again, it break title detection

don't lint doc/chronik, it gives false positives

update tests

address feedback ie preallocate memory and don't have a different default for regtest

@Fabien Maybe in a separate diff? I also need to update docs/build-*.md on how to build Chronik, or add a docs/build-chronik.md

rebase

rerun ci

build-chronik and -plugins succeeded

also update gitian-linux.yml; rebase

@bot build-chronik

fix order of commands

fix comments

do it like they do it on the gitian-linux.yml

rerun CI

CI failure unrelated

@bot build-chronik

remove --