feat: add CLI commands for integration management

[perasperaactual]

Overview

Add CLI commands for managing integrations (parallel to MCP tools for direct CLI usage by developers).

Motivation

While MCP tools enable AI agents, developers also need human-friendly CLI commands to list, inspect, and add integrations during development.

Acceptance Criteria

• stackwright integrations list - lists all integrations
• stackwright integrations get <name> - shows integration details
• stackwright integrations add - interactive prompts to add integration
• Commands respect project root discovery
• Output is human-readable with colors/formatting
• Help text for all commands
• Comprehensive tests

Implementation Details

Commands:

list command:

$ stackwright integrations list
Configured Integrations:
  logistics (openapi)
  users (graphql)
Total: 2

get command:

$ stackwright integrations get logistics
Integration: logistics
type: openapi
spec: ./specs/logistics-api.yaml
auth:
  type: bearer

add command (interactive):

$ stackwright integrations add
? Integration type: openapi
? Integration name: reports
? OpenAPI spec path or URL: ./specs/reports.yaml
? Authentication type: bearer
✓ Integration "reports" added successfully
Run 'pnpm prebuild' to generate code

Files to Create

• packages/cli/src/commands/integrations.ts (new)
• packages/cli/test/integrations.test.ts (new)

Files to Modify

• packages/cli/src/index.ts (register command)

Dependencies

• Depends on integration schema
• Requires inquirer for interactive prompts
• Requires chalk for colored output

Estimated Time

2-3 hours