feat(backends): implement new invoices backend · WeblateOrg/website@1729402

Skipping analyzing "saml2.saml": module is installed, but missing library stubs or py.typed marker

Skipping analyzing "saml2": module is installed, but missing library stubs or py.typed marker

Skipping analyzing "vies.types": module is installed, but missing library stubs or py.typed marker

Skipping analyzing "weasyprint": module is installed, but missing library stubs or py.typed marker

Skipping analyzing "weasyprint.text.fonts": module is installed, but missing library stubs or py.typed marker

Incompatible return value type (got "dict[str, Sequence[object]]", expected "dict[str, str | bytes]")

Signature of "save" incompatible with supertype "Model"

Name "get_quantity_unit_display" already defined on line 312

"InvoiceItem" has no attribute "_get_FIELD_display"

Skipping analyzing "appconf": module is installed, but missing library stubs or py.typed marker

Process completed with exit code 1.

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