Update and rename README.md to docs: add more details to readme

README.md → docs: add more details to readme

@@ -4,7 +4,9 @@ This repository contains Nextclade datasets and tools to maintain them.
 
 Documentation:
 
-- [Nextclade dataset curation guide](https://github.com/nextstrain/nextclade_data/blob/master/docs/dataset-curation-guide.md) - if you have a custom Nextclade dataset, or want to create one, or to contribute it to the Nextclade dataset collection.
+- [Nextclade dataset creation guide](https://github.com/nextstrain/nextclade_data/blob/master/docs/dataset-creation-guide.md) - if you want to create a new dataset.
+
+- [Nextclade dataset curation guide](https://github.com/nextstrain/nextclade_data/blob/master/docs/dataset-curation-guide.md) - if you have a dataset and want to contribute it to the Nextclade dataset collection.
 
 - [Nextclade dataset server maintenance guide](https://github.com/nextstrain/nextclade_data/blob/master/docs/dataset-server-maintenance.md) - if you are maintainer of the official Nextclade dataset server or want to deploy your own dataset sever.