Fix Python lint errors

[spicyfalafel]

To fix:

• hl7-fhir-r4-core/Account.py:6:14: E0602: Undefined variable 'Reference' (undefined-variable)
• hl7-fhir-r4-core/Account.py:1:0: W0622: Redefining built-in 'DeprecationWarning' (redefined-builtin)
• hl7-fhir-r4-core/Account.py:2:0: C0411: standard import "typing.Optional" should be placed before third party import "pydantic.*" (wrong-import-order)
• hl7-fhir-r4-core/Consent.py:18:10: E0001: Parsing failed: 'invalid syntax (Consent, line 18)' (syntax-error) why?
• class Cqf-questionnaire(DomainResource): - replace '-'. Same 'class Diagnosticreport-genetics(DomainResource)'
• fix python keyword properties name collision
• meta constructor
• fix BaseSearchParameters in r5
• add constructors by dataclass
• import Patient works
• fix search import
• fix hl7-fhir-r4-core -> hl7_fhir_r4_core
• fix backbone nested classes pascal case
• fix USCORE import (not generating right now)
• decide base/init.py or not.
• hl7-fhir-r4-core/List.py:11:0: E0102: class already defined line 1 (function-redefined) + check List imports
• fix lint multiple top-level packages found https://github.com/Aidbox/aidbox-sdk/actions/runs/11055748438/job/30715653811