🚨 Bump PHPStan to 2.x

[jbelien]

• Upgrade PHPStan to 2.1.30
• Fix PHPStan warnings

[Copilot]

Pull Request Overview

This PR upgrades PHPStan from version 0.12 to 2.1, which is a major version bump that requires fixing compatibility issues. The upgrade includes updating PHPStan configuration settings and resolving deprecated ignore patterns throughout the codebase.

• Updates PHPStan dependency from ^0.12.83 to ^2.1 and strict rules from ^0.12.9 to ^2.0
• Modernizes PHPStan configuration by changing level from "max" to 8 and updating ignore patterns
• Updates all PHPStan ignore comments to use the new identifier-based syntax instead of generic @phpstan-ignore-line

Reviewed Changes

Copilot reviewed 6 out of 7 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
composer.json	Updates PHPStan and PHPStan strict rules to version 2.x
phpstan.neon	Modernizes configuration with level 8 and new ignore patterns
Wikidata/Wikidata.php	Updates PHPStan ignore comments to use specific identifiers
Command/WikidataCommand.php	Updates PHPStan ignore comments to use specific identifiers
Command/GeoJSONCommand.php	Updates PHPStan ignore comments and comments out unused method
Command/AbstractCommand.php	Adds missing return statement to satisfy PHPStan

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