VSN-2047 : Rectifying integration of mass circuits importation.

Rectifying integration of mass circuits importation

Description

This MR aims to fix and finalize the integration of the mass circuits importation feature.
The changes include defining methods, implementing them, and setting up the required endpoints.

Main Changes

• feat: custom upload defined & referenced
  • Defined the upload method and referenced it in the Mass Importation component.
• feat: Method implementation
  • Added the implementation of the importation method.
• feat: Endpoint defined
  • Created the endpoint related to the importation action.
• feat: Adding method signature
  • Added the method signature for mass circuits importation.

Notes

• The source branch will be deleted after merge.
• Commits will be squashed when the MR is accepted.

Closes VSN-2047