[Hyperion] Backend/Frontend refactoring to enable chart-repo and chart-store for hyperion (Don't enable it now)

[manish-agrawal-ai]

Description

Chart repository and chart store would be enable for Hyperion mode in future. This is the first task which includes API end point refactoring for that task.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update
• Refactoring to add feature in future