Add Xdebug Support for PhpStorm and create dedicated documentation for it

[RemyMachado]

Overview

• Enable Xdebug support across all supported PHP versions.
• Add a concise guide for configuring Xdebug w/ PhpStorm.

Tasks

Docker / Compose

• Update all php stacks:
  • 8.1
  • 8.2
  • 8.3

Documentation

• How to install Xdebug on the docker container
• How to configure Xdebug with PhpStorm & Docker

Proposed folder structure:

docs/
├── PhpStorm/
│   ├── media/
│   ├── xdebug.md

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I'm not convinced by the folder structure. I would appreciate some feedback.

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Credits: Thank you @t-willm for figuring out how to configure all of this!