fix: enhance invoice download and electronic invoice processing

See merge request !95

- Introduced a new JS script block in `download.php` which gets triggered when user session is not
valid or on missing parameters `invoice` or `type`.
- `Dialog.js` has been modified to change how invoices are downloaded. Instead of creating an
invisible iframe, now it leverages fetch API and download.js to get the invoice and proceed
downloading.
- Corrected indentation of the text and button image in the dialog box of the invoice download.
- `Invoice.php` updated to include a new check for net value invoices. Adds articles to the
`ZugferdDocumentBuilder` and calculates VAT based on the detected invoice type (net or gross). This
ensures accurate electronic invoices.

fix: improve invoice handling for the electronic invoice

See merge request !93

This commit offers a more detailed pricing calculation, including Net and Gross pricing for the
electronic invoice export. It adds essential support for VAT calculation for invoice articles. It
also includes the quantity into the gross price calculation which was previously based only on the
net price. This could help in maintaining proper financial records. We also replaced the implicit
variable declaration with explicit variable assignment for better code readability.

refactor(phpstan): update usage of types for better clarity

See merge request !91

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 removes redundant import statements from the `Invoice/Factory.php` file for cleaner,
more efficient code. The removed imports are `QUI\Interfaces\Users\User` which was not used in the
file.

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.

Changed 'QUI\\DataBase\\Exception' to 'QUI\\Database\\Exception' in
src/QUI/ERP/Accounting/Invoice/Invoice.php to fix a typo in the namespace, which was causing a
failure in setting processing status.

Updated several files to make use of the pipe operator for better type declaration readability and
clarity. This includes specifying types in functions parameters and class property declarations.

fix: load user data for editing Invoice and TemporaryInvoice panels

See merge request !90

The commit uncomments the element destruction line and increases the delay from 1 second to 10
seconds in the Dialogs.js file. This is expected to improve the user-interface responsiveness and
reduce potential crashes.

- Modified 'Dialogs.css' to replace the button-based UI with a dropdown select for invoice download
options.
- Refactored the relevant methods in 'Dialogs.js' accordingly, removing button event listeners and
implementing new logic for select-based UI.
- Replaced 'QUIPopup' with 'QUIConfirm' to incorporate an 'OK' button for confirmation.
- Changed hardcoded button options to select options in the DOM structure.
- Altered event listeners in 'Dialogs.js' to suit the new 'select' element and handle submission of
invoice download requests differently.
- Preserved the behavior of injecting an iframe for actual downloads, with necessary changes in
parameters and references now pointing to the select value instead of button value.

Related: quiqqer/invoice#157

- Loaded user lock information to enhance usability in Invoice and TemporaryInvoice panels.
- Ensured more meaningful user data for lock notification messages.
- Renamed functions and aligned code for better readability.
- Refined dependency loading in unlock panel function to increase stability.
- Added 'Users' dependency for user information retrieval.

Related: pcsg/buero#488

fix: missing permission locale

See merge request !89

fix: e-invoice -> consider company name

See merge request !88

Next 2.x

See merge request !87

Next 2.x

See merge request !86

Next 2.x

See merge request !85

Feat e rechnung

See merge request !84

fix: check customer data for customer init

See merge request !83