Bring back the ess mono-repo, merge all ess* projects into one repository.

[YooSunYoung]

Reasons why we should bring back the mono repos

• It is not easy to search for certain functionalities across different ess*packages in the documentation.
• Dependencies between ess* packages not so easy to detect despite of nightly tests.

I think the mono-documentation, where we can search for all functionalities, will be more and more important.
It's not necessarily mono-repo problem but it will be easier to build the documentation if ess* are all in one repository.

Steps to merge repositories

- [ ] Clean up ess repository and make it up to date with the templates.

• Rename the old ess repo (this repo) to another name and start a new ess repository.
• Organize ess* repositories' documentation to be in a subdirectory.
  i.e. docs/ should be under docs/instruments/* or docs/techniques/* including logos
• Organize ess* repositories' tests to be in a subdirectory.
  i.e. tests should be under tests/instruments/* or tests/techniques/*
• Organize CI tests to have matrix per technique/instrument so that we can easily see which part of tests are failing. (?)
• Merge repositories using git(?)
• Remove ess_template (?)

[SimonHeybrock]

Can someone explain why we would re-use the ess-package's repo, instead of a new one, say ess-monorepo? We might not want to carry the git and issue history of the former around?

[jl-wynen]

To have a cleaner name? If you want to erase the history, we could rename the old 'ess' repo and make a new one with that name.

[SimonHeybrock]

👍 for renaming the old one (provided GitHub then lets you add a new one of the same name?).

[YooSunYoung]

I didn't have a particular opinion about where to merge all the ess* packages.
I just had to open this issue somewhere.

Clean up ess repository and make it up to date with the templates.

So I updated this step to be Rename the old ess repo (this repo) to another name and start a new ess repository.

I tried renaming/creating a new one with the original name thing and it worked in GitHub.