[Feature] Refactor CmsService: Replace 36+ block-specific methods with generic getBlockConfig

[lukasz-hycom]

Is your feature request related to a problem? Please describe.
packages/framework/src/modules/cms/cms.service.ts defines 36+ abstract methods, one per block type. Adding a new block forces changes in both CmsService and every integration (mocked, Strapi, Contentful), even when an integration does not support that block.

Consequences:

• The mocked CMS service is 255+ lines of mapper dispatching
• Strapi and Contentful must implement methods for blocks they may not use
• Violates the open-closed principle — the framework class changes whenever a new block is added

Describe the solution you'd like
Introduce a single generic method instead of the many block-specific ones:

export abstract class CmsService {
    // Core methods stay
    abstract getAppConfig(options: GetCmsAppConfigParams): Observable<AppConfig>;
    abstract getPage(options: GetCmsPageParams): Observable<Page | undefined>;
    abstract getPages(options: GetCmsPagesParams): Observable<Page[]>;
    abstract getHeader(options: GetCmsHeaderParams): Observable<Header>;
    abstract getFooter(options: GetCmsEntryParams): Observable<Footer>;

    // Single generic method replaces 30+ block-specific ones
    abstract getBlockConfig<T>(options: GetCmsBlockConfigParams): Observable<T>;
}

// Usage in block service:
const config = this.cmsService.getBlockConfig<TicketListBlock.TicketListBlock>({
    id: query.id,
    locale: headers['x-locale'],
    blockType: 'TicketListBlock', // used by integration to dispatch
});

Adding a new block would then only require a new mapper in the integration, without changing the framework interface.

Additional context (if applicable)

• Key file: packages/framework/src/modules/cms/cms.service.ts
• Rationale: High priority because it may be relatively easy to implement and would significantly improve this service.

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