This commit removes unreachable 'else' branches and irrelevant PHPStan error messages from the
PHPStan configuration file. It also updates the `InvoiceView` and `OutputProviderInvoice` classes
to add checks for the existence of methods before invoking them. This prevents runtime errors in
cases where the methods do not exist.

Related: #153

This commit addresses numerous PHPStan errors and warnings throughout different files in the
application. The changes include correcting faulty type expectations, reorganizing code sections
for readability and better functionality, and making sure function parameters satisfy required type
constraints. This enhances the overall code quality, readability, and maintainability.

Resolves an issue where QUI\\\\Database\\\\Exception was incorrectly referenced as
QUI\\\\DataBase\\\\Exception in phpstan-baseline.neon. It also removes the affected code for
cleaner modification.