feat: socketdock implementation

[pallavighule]

What

• Added socketdock transport session
• Added connect disconnect and message routes for accepting socketdock requests

[TimoGlastra]

@pallavighule would it be possible to add an example setup with socketdock? Can also be added in another PR, but to make it easy to get started with SocketDock (e.g. docker-compose setup)

[pallavighule]

@pallavighule would it be possible to add an example setup with socketdock? Can also be added in another PR, but to make it easy to get started with SocketDock (e.g. docker-compose setup)

@TimoGlastra For the SocketDock setup, I referred to the repository openwallet-foundation/didcomm-mediator-socketdock, where the complete setup is already provided. If needed, I can create a separate setup document and include it in a new PR. Please let me know your thoughts!