[Feature] Refactor integration config

[lukasz-hycom]

Is your feature request related to a problem? Please describe.
packages/configs/integrations/src/models/ contains 18 files that all follow the same pattern. To swap tickets from mocked to Zendesk, you change line 1. The actual swap is elegant (one-line change), but the pattern creates:

• 18 files that are 95% identical boilerplate
• Config.tickets! — non-null assertion (!) hides type errors. If the integration doesn't provide tickets, this crashes at runtime, not at compile time
• export import syntax is obscure TypeScript that many developers don't understand

Describe the solution you'd like
Replace the 18 individual model files with a single typed config file:

// packages/configs/integrations/src/config.ts
import { createIntegrationConfig } from '@o2s/framework/config';
import * as Mocked from '@o2s/integrations.mocked/integration';
import * as Zendesk from '@o2s/integrations.zendesk/integration';

export const integrations = createIntegrationConfig({
    // Each line is a swap point — change Mocked → Zendesk per domain
    cms:           Mocked,
    tickets:       Mocked,
    articles:      Mocked,
    notifications: Mocked,
    users:         Mocked,
    auth:          Mocked,
});

// createIntegrationConfig validates at compile time:
// - Each integration actually provides the domain it's assigned to
// - No ! assertions needed — type error if Zendesk doesn't export `cms`
// - Service/Request/Model types derived automatically

Bonus: This single file makes it immediately visible which integration backs each domain — instead of opening 18 separate files.

Additional context (if applicable)
N/A

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