fix all phpstan l6 errors

[fadrian06]

This pull request primarily improves code readability and consistency by reformatting long lines for better clarity and updating PHPDoc type annotations for better type accuracy. Additionally, it updates the static analysis configuration to refine which files are included in analysis.

Code formatting and readability improvements:

• Reformatted long strings in user messages and function calls in flight/commands/RouteCommand.php and flight/commands/AiGenerateInstructionsCommand.php to improve readability and maintainability. [1] [2] [3]

Type annotation updates:

• Updated PHPDoc type annotations in constructors of PdoWrapper and SimplePdo to use short nullables (e.g., ?string instead of string|null) and simplified array types for better type accuracy. [1] [2]

Static analysis configuration:

• Modified phpstan.dist.neon to remove certain paths (vendor, flight/util/ReturnTypeWillChange.php) from the excluded paths, potentially increasing code coverage for static analysis.