feat: Swift SDK update for version 18.0.0

[ArnabChatterjee20k]

This PR contains updates to the Swift SDK for version 18.0.0.

What's Changed

• Breaking: Renamed AuthMethod enum to ProjectAuthMethodId
• Breaking: Renamed EmailTemplateType to ProjectEmailTemplateId and EmailTemplateLocale to ProjectEmailTemplateLocale
• Breaking: Renamed ServiceId to ProjectServiceId, ProtocolId to ProjectProtocolId, Secure to ProjectSMTPSecure, ProjectPolicy to ProjectPolicyId
• Breaking: Replaced Scopes enum with ProjectKeyScopes for project key endpoints
• Breaking: Removed Project.updateDenyCanonicalEmailPolicy; replaced with updateDenyAliasedEmailPolicy, updateDenyDisposableEmailPolicy, and updateDenyFreeEmailPolicy
• Breaking: Removed AuthProvider model; use new ProjectOAuthProviderId enum instead
• Added: Project.get method to fetch current project details
• Added: Advisor, Presences, and Usage services
• Added: Insight, Presence, Report, UsageEvent, and UsageGauge models with list variants
• Added: ProjectAuthMethod, ProjectProtocol, and ProjectService models
• Added: ProjectOAuthProviderId and ProjectOAuth2GooglePrompt enums
• Updated: Project, Database, and OAuth2Google model schemas
• Updated: X-Appwrite-Response-Format header to 1.9.5