feat: add maui-sherpa CLI with AI-agent discoverability

[StephaneDelcroix]

Summary

Adds a new dotnet tool (maui-sherpa) that exposes MAUI Sherpa's capabilities as a CLI designed for discoverability by Copilot CLI and other AI code agents.

Usage

# Install globally
dotnet pack src/MauiSherpa.Cli -c Release -o ./nupkg
dotnet tool install --global MauiSherpa.Cli --add-source ./nupkg

# Or run directly
dotnet run --project src/MauiSherpa.Cli -- --help

Command Tree

maui-sherpa
├── features                    — JSON manifest of all capabilities (AI discovery)
├── doctor [--json]             — environment health check
├── android
│   ├── sdk info|packages|install|uninstall
│   ├── emulators list|start|stop
│   ├── devices
│   └── keystores create|signatures
├── apple
│   ├── simulators list|boot|shutdown|create
│   ├── devices
│   └── xcode
├── workloads list|sets|info
└── version

Key Design

• maui-sherpa features outputs a structured JSON manifest for AI agent tool discovery
• --json global flag on every command for machine-readable output
• Rich --help descriptions on all commands and subcommands
• Lightweight — depends only on System.CommandLine + MauiSherpa.Workloads (no heavy cloud SDKs)
• Wraps underlying tools directly (adb, xcrun simctl, keytool, sdkmanager, xcodebuild)
• PackAsTool configured for dotnet tool install

Example Output

$ maui-sherpa doctor
MAUI Sherpa — Environment Health Check
══════════════════════════════════════════

  ✓ .NET SDK: v10.0.100
  ✓ Android SDK: ~/Library/Android/sdk
  ✓ JDK: openjdk version "21.0.9"
  ✓ Xcode: Xcode 26.1.1
  ✓ iOS Simulators: 66 simulator(s) available

  5/5 checks passed.