feat(connector): Add support for get plan prices for Chargebee

[spritianeja03]

Type of Change

• Bugfix
• New feature
• Enhancement
• Refactoring
• Dependency updates
• Documentation
• CI/CD

Description

This PR integrates the get plan prices endpoint for chargebee, required to be called in the respective API handler for the same (not yet implemented)

Additional Changes

• This PR modifies the API contract
• This PR modifies the database schema
• This PR modifies application configuration/environment variables

Motivation and Context

Closes #9054

How did you test it?

Checklist

• I formatted the code cargo +nightly fmt --all
• I addressed lints thrown by cargo clippy
• I reviewed the submitted code
• I added unit tests for my changes where possible

[semanticdiff-com]

Review changes with  

Changed Files

File	Status
crates/hyperswitch_domain_models/src/types.rs	67% smaller
crates/hyperswitch_interfaces/src/connector_integration_v2.rs	53% smaller
crates/hyperswitch_connectors/src/connectors/recurly.rs	47% smaller
crates/hyperswitch_interfaces/src/api.rs	41% smaller
crates/hyperswitch_connectors/src/connectors/chargebee.rs	16% smaller
crates/hyperswitch_interfaces/src/conversion_impls.rs	5% smaller
crates/hyperswitch_connectors/src/connectors/chargebee/transformers.rs	5% smaller
crates/hyperswitch_connectors/src/default_implementations.rs	4% smaller
crates/hyperswitch_domain_models/src/router_data_v2/flow_common_types.rs	0% smaller
crates/hyperswitch_domain_models/src/router_flow_types.rs	0% smaller
crates/hyperswitch_domain_models/src/router_flow_types/subscriptions.rs	0% smaller
crates/hyperswitch_domain_models/src/router_request_types.rs	0% smaller
crates/hyperswitch_domain_models/src/router_request_types/subscriptions.rs	0% smaller
crates/hyperswitch_domain_models/src/router_response_types.rs	0% smaller
crates/hyperswitch_domain_models/src/router_response_types/subscriptions.rs	0% smaller
crates/hyperswitch_interfaces/src/api/subscriptions.rs	0% smaller
crates/hyperswitch_interfaces/src/api/subscriptions_v2.rs	0% smaller
crates/hyperswitch_interfaces/src/types.rs	0% smaller
crates/router/src/services/api.rs	0% smaller

[jagan-jaya]

Suggested change

	pub item_id: String,
	pub plan_price_id: String,

[deepanshu-iiitu]

Add corresponding changes for ChargebeeMetadata object in crates/router/src/core/connector_validation.rs

[deepanshu-iiitu]

Throw unimplemented error here instead of todo