feat: comprehensive Wazuh integration with Docker CI/CD and expanded security operations

Major enhancements:
- Added Docker image building and publishing to GitHub Container Registry with multi-platform support (linux/amd64, linux/arm64)
- Expanded from basic alert retrieval to comprehensive security operations with 14 MCP tools covering:
  * Vulnerability management (agent vulnerability summaries, critical vulnerabilities)
  * Agent monitoring (running agents, processes, network ports)
  * System statistics (weekly stats, remoted stats, log collector stats)
  * Log analysis (manager logs, error logs with search capabilities)
  * Cluster management (health checks, node listing)
- Updated environment configuration to support both Wazuh Manager API and Wazuh Indexer with proper SSL handling
- Enhanced documentation with detailed use cases, Docker deployment options, and comprehensive tool descriptions
- Upgraded wazuh-client dependency to v0.1.1 for expanded API capabilities
- Added agent ID formatting and validation for consistent three-digit zero-padded identifiers

This transforms the server from a simple alert fetcher into a full-featured security operations platform for AI-assisted Wazuh management.

.env.example

@@ -1,9 +1,39 @@
-# Wazuh API Configuration
-WAZUH_HOST=localhost
-WAZUH_PORT=55000
-WAZUH_USER=admin
-WAZUH_PASS=admin
-VERIFY_SSL=false
+# Wazuh MCP Server Environment Configuration Example
+#
+# Copy this file to .env and fill in your specific values.
+# Lines starting with # are comments.
 
-# MCP Server Configuration
-MCP_SERVER_PORT=8000
+# Wazuh Manager API Configuration
+# Hostname or IP address of the Wazuh Manager API server.
+WAZUH_API_HOST=localhost
+# Port number for the Wazuh Manager API.
+WAZUH_API_PORT=55000
+# Username for Wazuh Manager API authentication.
+WAZUH_API_USERNAME=wazuh
+# Password for Wazuh Manager API authentication.
+WAZUH_API_PASSWORD=wazuh
+
+# Wazuh Indexer API Configuration
+# Hostname or IP address of the Wazuh Indexer API server.
+WAZUH_INDEXER_HOST=localhost
+# Port number for the Wazuh Indexer API.
+WAZUH_INDEXER_PORT=9200
+# Username for Wazuh Indexer API authentication.
+WAZUH_INDEXER_USERNAME=admin
+# Password for Wazuh Indexer API authentication.
+WAZUH_INDEXER_PASSWORD=admin
+
+# SSL Configuration for Wazuh Connections
+# Set to "true" to verify SSL certificates for Wazuh API and Indexer connections.
+# Set to "false" to disable SSL verification (not recommended for production).
+WAZUH_VERIFY_SSL=false
+
+# Protocol for Wazuh Connections (Optional)
+# Overrides the default protocol used by the wazuh-client.
+# Typically "http" or "https". If not set, the client's default (usually https) will be used.
+# WAZUH_TEST_PROTOCOL=https
+
+# Logging Configuration
+# Controls the log level for the application and its dependencies.
+# Examples: "info", "debug", "trace", "mcp_server_wazuh=debug,wazuh_client=info"
+RUST_LOG=info