feat: add macro to generate ToEncryptable trait

[dracarys18]

Type of Change

• Enhancement

Description

This PR adds a macro to generate ToEncryptable trait on different types

Motivation and Context

This PR removes the effort of repetitively implementing ToEncryptable trait which is used for batch encryption/decryption in the encryption service by adding a macro which generates code upon deriving it

How did you test it?

THIS CANNOT BE TESTED ON SANDBOX

• Compiler guided. Since this does not change any core flow
• Basic test of MerchantCreate and Payments for sanity

Checklist

• I formatted the code cargo +nightly fmt --all
• I addressed lints thrown by cargo clippy
• I reviewed the submitted code

[semanticdiff-com]

Review changes with SemanticDiff.

Analyzed 19 of 19 files.

Overall, the semantic diff is 35% smaller than the GitHub diff.

	Filename	Status
✔️	crates/router_derive/src/lib.rs	Analyzed
✔️	crates/router_derive/src/macros.rs	Analyzed
✔️	crates/router_derive/src/macros/to_encryptable.rs	Analyzed
✔️	crates/router/src/utils.rs	46.03% smaller
✔️	crates/router/src/types/domain/address.rs	25.61% smaller
✔️	crates/router/src/types/domain/event.rs	50.74% smaller
✔️	crates/router/src/core/admin.rs	91.59% smaller
✔️	crates/router/src/core/customers.rs	69.61% smaller
✔️	crates/router/src/core/payouts/helpers.rs	60.27% smaller
✔️	crates/router/src/core/payments/helpers.rs	60.3% smaller
✔️	crates/router/src/core/payments/operations/payment_create.rs	68.4% smaller
✔️	crates/hyperswitch_domain_models/src/customer.rs	38.7% smaller
✔️	crates/hyperswitch_domain_models/src/merchant_connector_account.rs	23.81% smaller
✔️	crates/hyperswitch_domain_models/src/payments.rs	53.23% smaller
✔️	crates/hyperswitch_domain_models/src/payments/payment_intent.rs	Analyzed
✔️	crates/diesel_models/src/address.rs	8.86% smaller
✔️	crates/diesel_models/src/events.rs	10.29% smaller
✔️	crates/api_models/src/customers.rs	8.53% smaller
✔️	crates/api_models/src/payments.rs	0.08% smaller

[SanchithHegde]

Other than that, looks good to me!