Update devcontainer.json

[MayMeow]

No description provided.

[Copilot]

Pull Request Overview

This PR updates the devcontainer configuration by changing the base image and removing the separate PHP feature.

• Update the container image from a universal container to a PHP SDK image.
• Remove the standalone PHP feature configuration.

Comments suppressed due to low confidence (2)

.devcontainer/devcontainer.json:3

• Confirm that removing the PHP feature is intentional and update the project documentation or commit notes to reflect this change if necessary.

"ghcr.io/devcontainers/features/php:1": {}

.devcontainer/devcontainer.json:2

• Ensure that the updated image 'ghcr.io/maymeow/php/sdk:8.4' provides all the necessary tools and configurations previously supplied by the universal image.

"image": "ghcr.io/maymeow/php/sdk:8.4",

[MayMeow]

yes it provides all thatt is needed