docs: add example programs for common usage patterns (#19)

Adds four focused examples in examples/ directory:
- basic: drop-in logger with web UI
- namespaces: namespace-based logging by component
- client: programmatic log client with filtering
- log-levels: all log levels and filtering

Fixes #7

examples/basic/main.go

@@ -0,0 +1,36 @@
+// Example: basic usage of log-socket as a drop-in logger.
+//
+// This demonstrates using the package-level logging functions,
+// which work similarly to the standard library's log package.
+package main
+
+import (
+	"fmt"
+	"net/http"
+
+	"github.com/taigrr/log-socket/v2/browser"
+	logger "github.com/taigrr/log-socket/v2/log"
+	"github.com/taigrr/log-socket/v2/ws"
+)
+
+func main() {
+	defer logger.Flush()
+
+	// Set the minimum log level (default is LTrace, showing everything)
+	logger.SetLogLevel(logger.LDebug)
+
+	// Package-level functions log to the "default" namespace
+	logger.Info("Application starting up")
+	logger.Debug("Debug mode enabled")
+	logger.Warnf("Config file not found at %s, using defaults", "/etc/app/config.yaml")
+	logger.Errorf("Failed to connect to database: %s", "connection refused")
+
+	// Print/Printf/Println are aliases for Info
+	logger.Println("This is equivalent to Infoln")
+
+	// Start the web UI so you can view logs at http://localhost:8080
+	http.HandleFunc("/ws", ws.LogSocketHandler)
+	http.HandleFunc("/", browser.LogSocketViewHandler)
+	fmt.Println("Log viewer available at http://localhost:8080")
+	logger.Fatal(http.ListenAndServe("0.0.0.0:8080", nil))
+}