[BUG] - <Missing Comments in GraphRAGIndex Class Resulting in 'None' Display in UI When Adding Index Collection in Resources Tab>
Description
Currently, when adding an index collection via the Resources tab in the UI, the GraphRAGIndex class does not display any descriptive information. Unlike other index types such as FileIndex, the GraphRAGIndex class lacks the necessary comments or docstrings, causing the UI to display 'None' in the settings page. This is problematic as users do not receive any context or guidance on the specific functionalities of the GraphRAGIndex.
Reproduction steps
Navigate to the Resources tab in the UI.
Attempt to add a new index collection and select the GraphRAGIndex type.
Observe that the UI displays 'None' for this index type instead of relevant descriptions or information.
Screenshots

Logs
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Browsers
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OS
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Additional information
Root Cause:
The GraphRAGIndex class lacks descriptive comments or docstrings that are typically rendered in the UI to inform the user about the index’s purpose and settings. This absence contrasts with classes like FileIndex, where comments are displayed successfully in the UI to explain parameters. Proposed Solution:
Add appropriate docstrings or comments to the GraphRAGIndex class, allowing the settings page to properly render and display descriptions. This will ensure that users receive the necessary information when configuring this index type via the Resources tab.