Feat:Add Payment Intent Retrieval, Invoice Payment Method Details & Invoice PDF URL Support

[piyushsinghgaur1]

Summary

Enhance the billing module by adding support for retrieving payment intent details, associated payment method information for invoices, and invoice PDF download URLs. This will improve payment tracking, transparency, and usability.

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Proposed Features

1. Payment Intent Operations

• Add support to retrieve payment intents by ID
• Enable tracking of payment status and metadata via payment intent

2. Payment Details

• Retrieve payment method details associated with invoices
• Provide visibility into how a specific invoice was paid

3. Invoice PDF Support

• Support retrieval of invoice PDF download URLs
• Enable users to download or share invoice documents easily

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