fix: README add initial query and mutations desciptions.

README.md

@@ -101,6 +101,34 @@ npm run start
 
 The GraphQL API will be available at `http://localhost:4000/`
 
+### Available Queries and Mutations
+
+#### Queries
+- `apiVersion` - Returns the API build version
+- `zabbixVersion` - Returns the version of the connected Zabbix instance
+- `login` - Authenticates with Zabbix and returns an authentication token
+- `logout` - Logs out from Zabbix, invalidating the current session
+- `allHosts` - Returns all hosts and their items
+- `allDevices` - Returns all devices and their items (hosts with deviceType)
+- `allHostGroups` - Returns all host groups
+- `locations` - Returns all locations used by hosts
+- `exportHostValueHistory` - Exports value history for Zabbix items
+- `userPermissions` - Returns all user permissions
+- `hasPermissions` - Checks if the current user has requested permissions
+- `exportUserRights` - Exports user rights (roles and groups)
+- `templates` - Returns templates
+- `allTemplateGroups` - Returns all template groups
+
+#### Mutations
+- `createHost` - Creates a single host in Zabbix
+- `importHostGroups` - Mass import Zabbix host groups
+- `importHosts` - Mass import hosts and assign them to host groups
+- `importUserRights` - Import user rights (roles and groups) into Zabbix
+- `importTemplateGroups` - Mass import template groups
+- `importTemplates` - Mass import templates
+- `deleteTemplates` - Delete templates by their IDs or by a name pattern
+- `deleteTemplateGroups` - Delete template groups by their IDs or by a name pattern
+
 ### Production Build
 
 ```bash