Refactor pricing endpoints and enhance support for pricing retrieval

- Added a new endpoint `/api/support/pricing` to allow users to retrieve pricing information, making it accessible for role request dialogs.
- Introduced the `GetSupportPricing` method to handle pricing queries, ensuring that pricing data is available to non-admin users.
- Updated frontend components to integrate the new pricing retrieval functionality, displaying estimated costs based on user-selected configurations.
- Removed the `PricingSettingsDto` as it is no longer needed, streamlining the pricing data structure.
- Enhanced API documentation to reflect the new endpoint and its usage in the support context.

frontend/src/shared/lib/i18n.ts

@@ -135,6 +135,11 @@ const resources = {
         newRoleName: 'Название роли',
         newRoleMaxConfigs: 'Количество конфигов (-1 — без лимита)',
         newRoleMaxIpLimit: 'Количество IP (-1 — без лимита)',
+        pricingTitle: 'Ориентировочная стоимость',
+        pricingQuarter: '3 месяца: {{price}}',
+        pricingHalfYear: 'Полгода: {{price}}',
+        pricingYear: 'Год: {{price}}',
+        pricingDisclaimer: 'Цены на данный момент ознакомительные.',
         justification: 'Обоснование',
         ticketCreated: 'Обращение отправлено.',
         roleRequestPending: 'У вас уже есть необработанная заявка на роль.',
@@ -571,6 +576,11 @@ const resources = {
         newRoleName: 'Role name',
         newRoleMaxConfigs: 'Max configs (-1 = unlimited)',
         newRoleMaxIpLimit: 'Max IPs (-1 = unlimited)',
+        pricingTitle: 'Estimated cost',
+        pricingQuarter: '3 months: {{price}}',
+        pricingHalfYear: '6 months: {{price}}',
+        pricingYear: 'Year: {{price}}',
+        pricingDisclaimer: 'Prices are indicative only at this time.',
         justification: 'Justification',
         ticketCreated: 'Ticket submitted.',
         roleRequestPending: 'You already have a pending role request.',