Taken the docs from Beth and integrated with previous PR request. Major changes

- Fixed error concerning coordinates with refget and Ensembl. Refget is 0-based
- Added more information about different types of retrieval
- Added a python notebook example (need to know how to link this)
- Moved docs to a peer of GraphQL
- Added information about odd things when using refget and alternative 3rd party clients
- Added more metadata examples

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Co-authored-by: Beth Flint <beth@ebi.ac.uk>

* Added help and about for GraphQL service

* fix broken tests and urls in readme

* Update GraphQL URL and queries/responses

* update URL

* remove host from URL

* Update using-graphql.md

* Apply suggestions from code review

Co-authored-by: Ben Moore - Ensembl <bmoore@ebi.ac.uk>

* Removed status and tags

* implement suggested changes in the PR

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Co-authored-by: Beth Flint <beth@ebi.ac.uk>
Co-authored-by: bethflint <45971031+bethflint@users.noreply.github.com>
Co-authored-by: Ben Moore - Ensembl <bmoore@ebi.ac.uk>

* annotation-to-help

* Update toc.yml

* updates-help

* title

* link-update

* remove brackets

* internal-link-change

https://www.ebi.ac.uk/panda/jira/browse/ENSWBSITES-1827

Switch to undated filename, for easier updating

Plus, some code updates

Co-authored-by: Andrey Azov <andrey@ebi.ac.uk>

This reverts commit 0c3f2e80.

This reverts commit 9b75d9f6.

This reverts commit e18591de.

This reverts commit a0468d16.