Add sepaxml stubs

stubs/sepaxml/__init__.pyi

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+from .debit import SepaDD as SepaDD
+from .transfer import SepaTransfer as SepaTransfer
+
+version: str

stubs/sepaxml/debit.pyi

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+from .shared import SepaPaymentInitn as SepaPaymentInitn
+from .utils import ADDRESS_MAPPING as ADDRESS_MAPPING, int_to_decimal_str as int_to_decimal_str, make_id as make_id
+
+class SepaDD(SepaPaymentInitn):
+    root_el: str
+    def __init__(self, config, schema: str = 'pain.008.003.02', clean: bool = True) -> None: ...
+    def check_config(self, config): ...
+    def check_payment(self, payment): ...
+    def add_payment(self, payment) -> None: ...

stubs/sepaxml/shared.pyi

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+from .utils import decimal_str_to_int as decimal_str_to_int, int_to_decimal_str as int_to_decimal_str, make_msg_id as make_msg_id
+from .validation import try_valid_xml as try_valid_xml
+from _typeshed import Incomplete
+
+class SepaPaymentInitn:
+    schema: Incomplete
+    msg_id: Incomplete
+    clean: Incomplete
+    def __init__(self, config, schema, clean: bool = True) -> None: ...
+    def export(self, validate: bool = True, pretty_print: bool = False) -> bytes: ...

stubs/sepaxml/transfer.pyi

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+from .shared import SepaPaymentInitn as SepaPaymentInitn
+from .utils import ADDRESS_MAPPING as ADDRESS_MAPPING, int_to_decimal_str as int_to_decimal_str, make_id as make_id
+
+class SepaTransfer(SepaPaymentInitn):
+    root_el: str
+    def __init__(self, config, schema: str = 'pain.001.001.03', clean: bool = True) -> None: ...
+    def check_config(self, config): ...
+    def check_payment(self, payment): ...
+    def add_payment(self, payment) -> None: ...

stubs/sepaxml/utils.pyi

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+from _typeshed import Incomplete
+
+using_sysrandom: bool
+
+def get_rand_string(length: int = 12, allowed_chars: str = '0123456789abcdef'): ...
+def make_msg_id(): ...
+def make_id(name): ...
+def int_to_decimal_str(integer): ...
+def decimal_str_to_int(decimal_string): ...
+
+ADDRESS_MAPPING: Incomplete

stubs/sepaxml/validation.pyi

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+class ValidationError(Exception): ...
+
+def try_valid_xml(xmlout, schema) -> None: ...