chore: add MCP integration and refactor documentation into modular how-to guides

- Moved GraphQL query samples into a new `docs/queries` directory for better organization.
- Added new queries and mutations, including `createHost.graphql` and `GetApiVersion.graphql`.
- Introduced `mcp-config.yaml` and updated `docker-compose.yml` for MCP integration.
- Updated IntelliJ `.idea/workspace.xml` settings to reflect project changes.
- Added new how-to guides (`docs/howtos`) for permissions, tags, MCP integration, and schema usage.
- Enhanced tests by updating file paths and improving sample data locations.
- Refined permissions and host group structures in `zabbix-hostgroups.ts` and `resolvers.ts`.

docs/queries/sample_all_devices_query.graphql

@@ -0,0 +1,21 @@
+### Query
+Use this query to list all devices (hosts with device type and state).
+
+```graphql
+query AllDevices($name_pattern: String, $with_items: Boolean) {
+  allDevices(name_pattern: $name_pattern, with_items: $with_items) {
+    hostid
+    host
+    name
+    deviceType
+  }
+}
+```
+
+### Variables
+```json
+{
+  "name_pattern": "%",
+  "with_items": true
+}
+```