docs: remove Guides, add pages on other categories, add Types

[lucaseduoli]

This pull request includes significant restructuring and content updates to the documentation. The most important changes involve renaming and relocating several documentation files, as well as updating their content to reflect the new structure.

Documentation Restructuring:

• Renamed docs/docs/Guides/guides-chat-memory.md to docs/docs/Components/components-chat-memory.md and updated sidebar position and slug.
• Removed docs/docs/Guides/guides-data-message.md and its content, which was replaced by new files under docs/docs/Types/.
• Removed docs/docs/Guides/guides-new-to-llms.md.
• Added new category file docs/docs/Types/_category_.json with position and label.

New Documentation Content:

• Created docs/docs/Types/types-data.md to document the Data object, including its attributes and usage.
• Created docs/docs/Types/types-message.md to document the Message object, including its attributes and usage.

Content Updates:

• Updated links in docs/docs/Components/components-chat-memory.md to reflect the new structure.
• Updated docs/docs/Workspace/workspace-playground.md to correct links to the Chat Memory section.