refactor: modularize payment hub routing

[Rahulchaudharyji2]

Description

This PR addresses #108 the long-standing TODO in the PaymentHubRoutingModule to separate routing into clean feature modules.

Changes:

• Created dedicated BatchesModule, SubBatchesModule, and TransfersModule.
• Moved routing logic into specific *-routing.module.ts files within each feature directory.
• Implemented Lazy Loading for these feature modules in PaymentHubRoutingModule to improve maintainability and potentially reduce initial bundle size.
• Cleaned up PaymentHubModule by removing unnecessary direct component declarations.

Why: This refactor improves the modularity of the application, makes the codebase easier to navigate for future developers, and resolves technical debt identified in the source code.

Checklist

• Followed the PR title naming convention mentioned above.
• Followed the naming conventions as given in https://docs.google.com/document/d/1Q4vaMSzrTxxh9TS0RILuNkSkYCxotuYk1Xe0CMIkkCU/edit?usp=sharing

[Flashl3opard]

Hi @Rahulchaudharyji2 ! Thanks for the PR. Before moving forward, please ensure you’ve signed the CLA, created and linked the relevant Jira ticket, carefully reviewed the CONTRIBUTING.md guideline.
Secondly, squash your changes into a single clean commit.
Please also include relevant screenshots or a short demo video of the implemented changes as well, for easier review.