Merge remote-tracking branch 'remotes/dev/master'

BAP-22826: Update Symfony to at least v6.4.15 (#39842)

BAP-22826: Update Symfony to at least v6.4.15:
- Symfony updated to v6.4.15

BB-23720: Update composer requirements for conversations (#38884)

BB-24140: Port to 6.0 (#38761)

- added new package gen-ai
- added system configuration options for AI
- added form_type for config_file_type
- added data transformer for the config file
- added ContentGenerationRequest
- added interfaces for Client and Factory
- added interfaces for task
- added tasks services config
- added user request DTO to keep in one place post-request data
- added factory and client for Vertex AI
- added OpenAI client and factory
- added OpenAI message structure
- added controller
- added connection checker
- added form entity resolver
- added product based tasks
- added CryptedTextType doctrine extension type
- added factory for content generation request
- added factory methods for user content generation request
- added form modal window
- added LandingPageDescriptionOpenPromptTask, ContentBlockDescriptionOpenPromptTask, EmailMessageOpenPromptTask
- added unit tests
- added function tests
- added behat tests

BB-24139: Port to 5.1 (#38763)

- added new package gen-ai
- added system configuration options for AI
- added form_type for config_file_type
- added data transformer for the config file
- added ContentGenerationRequest
- added interfaces for Client and Factory
- added interfaces for task
- added tasks services config
- added user request DTO to keep in one place post-request data
- added factory and client for Vertex AI
- added OpenAI client and factory
- added OpenAI message structure
- added controller
- added connection checker
- added form entity resolver
- added product based tasks
- added CryptedTextType doctrine extension type
- added factory for content generation request
- added factory methods for user content generation request
- added form modal window
- added LandingPageDescriptionOpenPromptTask, ContentBlockDescriptionOpenPromptTask, EmailMessageOpenPromptTask
- added unit tests
- added function tests
- added behat tests

BB-23028: Search Autocomplete Suggestions (6.0) (#38120)

- added WebsiteSearchSuggestionBundle
- added Suggestion, SuggestionProduct entity classes
- added MQ topics and processors for generating suggestions
- added cron command to initiate cleaning of orphaned suggestions
- updated search autocomplete handler to add suggestions
- added system config setting and feature toggle
- updated changelog and documentation
- added behat tests

BB-23028: Search Autocomplete Suggestions (5.1) (#36816)

- added WebsiteSearchSuggestionBundle
- added Suggestion, SuggestionProduct entity classes
- added MQ topics and processors for generating suggestions
- added cron command to initiate cleaning of orphaned suggestions
- updated search autocomplete handler to add suggestions
- added system config setting and feature toggle
- updated changelog and documentation
- added behat tests

BB-23826: Release preparation activities - Generate UPGRADE-*.md, CHA…

…NGELOG-*.md files (#37961)

BB-23739: Release preparation activities - Generate UPGRADE-*.md, CHA…

…NGELOG-*.md files (#37708)

BB-22845 Theme migration scripts & layout element debug commands for …

…v5.1 (#37118)

- Added commands to generate artifacts for layout theme BC tests
- Added a package that allows dumping the current theme to reuse it with OroCommerce 6.0 as a base theme that doesn't require any significant changes during upgrade

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Co-authored-by: Zsombor Boldizsar-Zeik <[email protected]>
Co-authored-by: ayatsenko <[email protected]>
Co-authored-by: Valerii Yustyniuk <[email protected]>