Add support for versioned API documentation (v1, v2, etc.)

[stackmasteraliza]

Currently, the package generates a single OpenAPI spec for all routes. For APIs with multiple versions (/api/v1, /api/v2), there's no way to:

• Auto-detect and group routes by version
• Generate separate specs per version
• Switch between versions in Swagger UI

Proposed Solution

• Auto-detect version prefixes from routes
• Generate separate openapi-v1.json, openapi-v2.json specs
• Add version switcher dropdown in Swagger UI
• Config option to define version patterns

Example Config

'versions' => [
    'v1' => 'api/v1/*',
    'v2' => 'api/v2/*',
],