Update the documentation for `kin_sdk` package

[thibaud-perrin]

📝 Issue Description

Create comprehensive documentation for the entire kin_sdk package. The following components need detailed documentation:

• common: (pydantic_validation_error, validate_grpc_request)
• grpc_services: (grpc_server_base, models, service_registry_server, service_server)
• kin: (base, kin_workflow)
• tool: (base)
• trigger: (base)

🚀 Objective

Provide clear and detailed documentation for the kin_sdk package to facilitate understanding, usage, and maintenance of the package by developers.

💰 Business Outcome

Comprehensive documentation will improve the usability and adoption of the kin_sdk package. It will help developers to quickly understand and effectively use the package, reducing onboarding time and support requests. This can lead to increased productivity and better overall user satisfaction.

📝 Task List

• Document common components (pydantic_validation_error, validate_grpc_request)
• Document grpc_services components (grpc_server_base, models, service_registry_server, service_server)
• Document kin components (base, kin_workflow)
• Document tool component (base)
• Document trigger component (base)
• Ensure documentation is clear, comprehensive, and up-to-date

💡 Potential Solution

Migrate from Sphinx to MkDocs documentation tool, to create and maintain the documentation. Ensure that each component has a detailed description, usage examples, and explanations of key concepts and functionalities. Include diagrams or flowcharts where necessary to illustrate complex processes.

📈 Priority

High 🚨