feat(sdk): ✨ Implement EdgeXR Master Controller Go SDK foundation
Phase 1 Implementation - Core SDK foundation with typed APIs:
## New Components Added:
- **SDK Package Structure**: `/sdk/client`, `/sdk/internal/http`, `/sdk/examples`
- **Core Types**: App, AppInstance, Cloudlet with JSON marshaling
- **HTTP Transport**: Resilient HTTP client with go-retryablehttp
- **Auth System**: Pluggable providers (StaticToken, NoAuth)
- **Client**: Configurable SDK client with retry and logging options
## API Implementation:
- **App Management**: CreateApp, ShowApp, ShowApps, DeleteApp
- **Error Handling**: Structured APIError with status codes and messages
- **Response Parsing**: EdgeXR streaming JSON response support
- **Context Support**: All APIs accept context.Context for timeouts/cancellation
## Testing & Examples:
- **Unit Tests**: Comprehensive test suite with httptest mock servers
- **Example App**: Complete app lifecycle demonstration in examples/deploy_app.go
- **Test Coverage**: Create, show, list, delete operations with error conditions
## Build Infrastructure:
- **Makefile**: Automated code generation, testing, and building
- **Dependencies**: Added go-retryablehttp, testify, oapi-codegen
- **Configuration**: oapi-codegen.yaml for type generation
## API Mapping:
- CreateApp → POST /auth/ctrl/CreateApp
- ShowApp → POST /auth/ctrl/ShowApp
- DeleteApp → POST /auth/ctrl/DeleteApp
Following existing prototype patterns while adding type safety, retry logic,
and comprehensive error handling. Ready for Phase 2 AppInstance APIs.
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
Waldemar
9a06c608b2