feat: distributed session keys

[joepegler]

What

• Implement support for distributed session keys in the Biconomy Client SDK

Why

"Implementing distributed session keys will enhance the security and flexibility of our SDK. This feature will allow for more granular control over permissions and improve the overall user experience. Expected outcomes include:

• Improved security through distributed key management
• Enhanced flexibility for developers implementing session-based authentication
• Better alignment with emerging standards in account abstraction"

How

  1. Adding a new `DANSessionKeyManagerModule` to handle distributed session keys
  2. Updating the `sessions` module to include support for distributed session key functionality
  3. Modifying the `Account` to integrate the new session key features
  4. Updating relevant types and utility functions to accommodate the new distributed session key structure
  5. Adjusting test suites to cover the new functionality
  6. Updating documentation to reflect the new features and usage"

[joepegler]

SL are now ready with epv7