Added verified and formatted resource links for the following languages:

• Cypher (Neo4j Query Language)

• Cython

• Common Lisp

• ClojureScript



Each section includes official documentation, tutorials, and relevant online courses.



Followed consistent markdown formatting for readability and standardization.



What does this PR do?

Add resource(s)



IMPORTANT

 Read our [contributing guidelines](https://github.com/EbookFoundation/free-programming-books/blob/main/docs/CONTRIBUTING.md).

 Is this a revision of a previously submitted PR?

For resources

Description

Adds official and high-quality learning resources for Cypher, Cython, Common Lisp, and ClojureScript.



Why is this valuable (or not)?

These are verified, beginner-to-advanced references that expand the repo’s coverage of important programming languages and tools.



How do we know it's really free?

All linked materials are publicly available without paywalls, registration, or subscription requirements.



For book lists, is it a book? For course lists, is it a course? etc.

Includes official documentation (HTML/PDF) and an online course (Neo4j GraphAcademy).



Checklist:

 [Search](https://ebookfoundation.github.io/free-programming-books-search/) for duplicates.

 Include author(s) and platform where appropriate.

 Put lists in alphabetical order, correct spacing.

 Add needed indications (PDF, access notes, under construction).

 Used an informative name for this pull request.

Follow-up

 Checked the status of GitHub Actions and resolved any warnings.

