Add comprehensive documentation for CLICD features and operations

- Introduced Container Management documentation covering lifecycle operations, resource management, and console access.
- Added Dashboard documentation detailing metrics and related APIs.
- Created Host Report documentation summarizing host environment and resource status.
- Included Image Management documentation for template handling and management actions.
- Documented Networking and Routing features including NAT4 and IPv6 management.
- Added Security Alerts documentation outlining alert scenarios and API usage.
- Created Snapshot Management documentation for snapshot operations and scheduling.
- Documented Sub-user management for granting access to specific containers.
- Added Configuration guide detailing runtime settings and security recommendations.
- Created Installation guide for setting up CLICD with requirements and steps.
- Added Introduction and Quick Start guides for new users.
- Documented Upgrade process with version checking and pre-upgrade checklist.
- Created Deployment guide for service exposure and firewall recommendations.
- Added FAQ section addressing common questions and concerns.
- Documented Troubleshooting steps for common issues encountered.

docs/en/features/host-report.md

@@ -0,0 +1,21 @@
+# Host Report
+
+The host report summarizes the host runtime environment, resource status, and virtualization dependencies. It is useful for post-installation checks, troubleshooting, or sharing environment information with maintainers.
+
+## Contents
+
+- System version and kernel information.
+- CPU, memory, disk, and Swap.
+- Network status.
+- LXC/KVM dependency status.
+- CLICD service status.
+
+## Related APIs
+
+```http
+GET /api/v1/host-report
+GET /api/v1/host-info
+GET /api/v1/swap
+```
+
+Before sending a report externally, check whether it contains public IPs, private networks, usernames, keys, tickets, or business domains.