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>

vision.md

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+# Iris Vision
+
+WASM reactive UI framework for Go - build browser applications without JavaScript.
+
+## Organization Context
+
+This repo is part of Flowmade. See [organization manifesto](../architecture/manifesto.md) for who we are and what we believe.
+
+## What This Is
+
+Iris is an open-source UI framework that enables Go developers to build reactive browser applications compiled to WebAssembly. It provides:
+
+- **Signals-based reactivity** - Automatic DOM updates when state changes
+- **Component library** - Button, Text, Input, View, Canvas, SVG
+- **Client-side routing** - Router with guards and history management
+- **OIDC authentication** - Browser-based auth flows for WASM apps
+- **Static file server** - Host component for serving WASM applications
+
+## Who This Serves
+
+- **Go developers** who want to build web UIs without learning JavaScript
+- **Teams** building internal tools and dashboards
+- **Projects** that benefit from shared Go code between server and client
+
+## Goals
+
+1. **Simple reactivity** - Signals that just work, no complex state management
+2. **Familiar patterns** - Go idioms, not React/Vue patterns forced into Go
+3. **WASM-first** - Designed for WebAssembly, not ported from elsewhere
+4. **Minimal dependencies** - Only syscall/js for browser interop
+
+## Non-Goals
+
+- Server-side rendering (SSR)
+- Virtual DOM diffing
+- CSS-in-Go styling system
+- Component marketplace