Add instructions management functionality and update related components

- Introduced new endpoints for managing instruction intros and tabs, allowing admins to create, update, and delete instructional content.
- Enhanced the FactoryResetCommandHandler to include the seeding of instruction data during a factory reset.
- Updated the database schema to include InstructionIntro and InstructionTab entities, with corresponding migrations.
- Improved frontend routing and components to support the new instructions section, including a dedicated page for displaying instructions and tabs.
- Enhanced API documentation to reflect the new instruction management features and their expected request/response formats.
- Added localization support for the new instructions functionality in both Russian and English.

frontend/src/features/instructions/api.ts

@@ -0,0 +1,10 @@
+import { apiRequest } from '@/shared/api/client'
+import type { InstructionIntroDto, InstructionTabDto } from '@/shared/api/types'
+
+export function getInstructionIntro() {
+  return apiRequest<InstructionIntroDto>('/instructions/intro')
+}
+
+export function listInstructionTabs() {
+  return apiRequest<InstructionTabDto[]>('/instructions/tabs')
+}