Initial iris repository structure

WASM reactive UI framework for Go:
- reactive/ - Signal[T], Effect, Runtime
- ui/ - Button, Text, Input, View, Canvas, SVG components
- navigation/ - Router, guards, history management
- auth/ - OIDC client for WASM applications
- host/ - Static file server

Extracted from arcadia as open-source component.

Co-Authored-By: Claude <noreply@anthropic.com>

navigation/components.go

@@ -0,0 +1,90 @@
+package navigation
+
+import (
+	"git.flowmade.one/flowmade-one/iris/reactive"
+	"git.flowmade.one/flowmade-one/iris/ui"
+)
+
+var globalRouter *Router
+var globalHistory *HistoryManager
+
+func SetGlobalRouter(router *Router) {
+	globalRouter = router
+	globalHistory = NewHistoryManager(router)
+	globalHistory.Start()
+}
+
+func GetGlobalRouter() *Router {
+	return globalRouter
+}
+
+// RouterView renders the current route's view
+func RouterView() ui.View {
+	if globalRouter == nil {
+		return ui.TextFromString("Router not initialized").Color("#ff4444")
+	}
+	
+	// Create a view that updates when the route changes
+	view := ui.NewView()
+	
+	reactive.NewEffect(func() {
+		currentView := globalRouter.GetCurrentView()
+		// Clear previous content and add new view
+		// Note: This is a simplified approach - in a real implementation
+		// we'd need better DOM diffing
+		view = currentView
+	})
+	
+	return view
+}
+
+// Link creates a navigational link that updates the route
+func Link(path string, content ui.View) ui.View {
+	if globalHistory == nil {
+		return content
+	}
+	
+	// Create a simple clickable element that navigates with proper styling for horizontal layout
+	button := ui.Button(func() {
+		globalHistory.PushState(path)
+	}, content)
+	
+	// Style the button to look like a link and work in horizontal layouts
+	return button.Padding("8px 12px").Background("transparent").Border("none")
+}
+
+// Navigate programmatically navigates to a path
+func Navigate(path string) {
+	if globalHistory != nil {
+		globalHistory.PushState(path)
+	}
+}
+
+// Replace programmatically replaces current path
+func Replace(path string) {
+	if globalHistory != nil {
+		globalHistory.ReplaceState(path)
+	}
+}
+
+// Back navigates back in history
+func Back() {
+	if globalHistory != nil {
+		globalHistory.Back()
+	}
+}
+
+// Forward navigates forward in history
+func Forward() {
+	if globalHistory != nil {
+		globalHistory.Forward()
+	}
+}
+
+// GetCurrentPath returns the current route path
+func GetCurrentPath() string {
+	if globalRouter != nil {
+		return globalRouter.GetCurrentPath()
+	}
+	return ""
+}