fix(environment.phpVersion): consider the project's composer php version 🇧🇷

[rejmann]

I encountered the same issue described in the issue #1710 and decided to implement a fix/feature to consider the version defined in composer.json or the PHP version installed.

The idea behind this implementation was to add a configuration in the local workspace file .vscode/settings.json, using the key intelephense.environment.phpVersion, where we can define the specific version for the project.

{
    "intelephense.environment.phpVersion": "^7.4"
}

Whenever the extension is activated, the process will check and, if it does not exist, will create the .vscode directory to ensure that Intelephense uses the PHP version configured for each project, providing a more accurate and controlled environment.

I will be happy to contribute to the extension and I am open to suggestions for improvements!