Update the documentation for all the changes of version 3.0 (dashboard)

Review and update the project documentation to reflect all changes introduced in version 3.0.0. This includes, but is not limited to:

• New features
• Breaking changes
• Updated Data Queries
• Deprecated functionality
• Configuration updates
• Any relevant usage examples or code snippets

Acceptance Criteria:

• All new features are documented with clear usage examples.
• All breaking changes are highlighted with migration guidance.
• Deprecated features are clearly marked.
• README and other relevant docs are updated accordingly.
• Changelog is consistent with documentation updates.