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_delete_templates_mutation.graphql

@@ -0,0 +1,30 @@
+### Mutation
+Use this mutation to delete templates by their numeric IDs or by a name pattern.
+
+```graphql
+mutation DeleteTemplates($templateids: [Int!], $name_pattern: String) {
+  deleteTemplates(templateids: $templateids, name_pattern: $name_pattern) {
+    id
+    message
+    error {
+      message
+      code
+      data
+    }
+  }
+}
+```
+
+### Variables (by ID)
+```json
+{
+  "templateids": [501]
+}
+```
+
+### Variables (by name pattern)
+```json
+{
+  "name_pattern": "BT_DEVICE_TRACKER%"
+}
+```