refactor(db-repository): extract remote folder queries to dedicated repositories

[rafaeltonholo]

Contribution Summary

Linked Issue/Ticket: Part of #11470

Description

• Add RemoteFolderQueryRepository interface with getAllByAccountId method
• Add RemoteFolderDetailsRepository interface with getAllByAccountId method
• Add DefaultRemoteFolderQueryRepository and DefaultRemoteFolderDetailsRepository implementations
• Remove getRemoteFolders and getRemoteFolderDetails from FolderRepository
• Update GetAccountFolders, AccountSettingsViewModel, DefaultDisplayFolderRepository, DefaultSpecialFolderUpdater, and FolderSettingsProvider to use new repositories
• Make SettingsExporter.exportPreferences and related methods suspend functions
• Make FolderSettingsChangedListener.onFolderSettingsChanged suspend function and notify on main immediate dispatcher
• Migrate RemoteFolderDetails from data class to typealias referencing API module

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• I have read and affirm that my contribution adheres to Mozilla’s Community Participation Guidelines
• This contribution is in Kotlin where possible
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• This contribution includes tests for any new functionality, and maintains tests for any updated functionality.
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• This PR has a descriptive title and body that accurately outlines all changes made, and contains a reference to any issues that it fixes (e.g. Closes #XXX or Fixes #XXX).

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