add fetch methodes request to javascript

[kruimol]

Description

Added the GET POST PUT DELETE methodes for javascript.
Just some examples with some example data and json parser (where json is expected).

Type of Change

• [ x ] ✨ New snippet
• 🛠 Improvement to an existing snippet
• 🐞 Bug fix
• 📖 Documentation update
• 🔧 Other (please describe):

Checklist

• [ x ] I have tested my code and verified it works as expected.
• [ x ] My code follows the style and contribution guidelines of this project.
• [ x ] Comments are added where necessary for clarity.
• [ x ] Documentation has been updated (if applicable).
• [ x ] There are no new warnings or errors from my changes.

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[Mathys-Gasnier]

Hey, thanks for the contribution, but those don't match what we expect for snippets.
Snippets should be a function with a unique functionnality, not just wrapping a standard library function. They should also be self contained, and followed by one or two example of uses.