Add website favicon API and manual favicon profile updates.

Expose GET /tenants/{domain}/website/favicon for storefront tab icons, allow faviconMediaId on profile PATCH, and sync website API docs.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/business-profile/dto/update-business-profile.dto.ts

@@ -115,6 +115,11 @@ export class UpdateBusinessProfileDto {
   @IsInt()
   logoDarkMediaId?: number | null;
 
+  @IsOptional()
+  @Type(() => Number)
+  @IsInt()
+  faviconMediaId?: number | null;
+
   @IsOptional()
   @IsArray()
   @Type(() => Number)