refactor(api): restructured API for type safety, maintainability and docs generation

- These changes makes the API incombatible with previous versions
- Added new types for error handling, success responses, and health checks.
- Updated health check logic to utilize the new types for better clarity and structure.
- Refactored existing handlers to improve response consistency and error handling.
- Updated Makefile to include a new target for generating API types from Swagger.
- Updated "new agent" API to respond an encrypted cert pair

internal/logging/accesslog/status_code_range.go

@@ -10,7 +10,7 @@ import (
 type StatusCodeRange struct {
 	Start int
 	End   int
-}
+} // @name StatusCodeRange
 
 var ErrInvalidStatusCodeRange = gperr.New("invalid status code range")