added doc about the contextloader from hwsauth

HWSAuth.md

@@ -144,6 +144,53 @@ if err != nil {
 }
 ```
 
+### 5. (Optional) Global Context Loader
+
+For accessing the current user across your application (especially useful in templates), you can create a global `ContextLoader`:
+
+```go
+package contexts
+
+import (
+    "yourapp/internal/models"
+    "git.haelnorr.com/h/golib/hwsauth"
+)
+
+// Global variable for accessing current user from context
+var CurrentUser hwsauth.ContextLoader[*models.User]
+```
+
+Then in your auth setup, assign the authenticator's `CurrentModel` method:
+
+```go
+func setupAuth(...) (*hwsauth.Authenticator[*User, bun.Tx], error) {
+    // ... create authenticator ...
+    
+    // Set up global context loader
+    contexts.CurrentUser = auth.CurrentModel
+    
+    return auth, nil
+}
+```
+
+Now you can access the current user anywhere in your application:
+
+```go
+// In handlers
+func profileHandler(w http.ResponseWriter, r *http.Request) {
+    user := contexts.CurrentUser(r.Context())
+    // use user...
+}
+
+// In templates (templ example)
+templ Profile() {
+    {{ user := contexts.CurrentUser(ctx) }}
+    <h1>Hello, { user.Username }</h1>
+}
+```
+
+**Note**: The user will be `nil` if not authenticated, so check for nil in non-protected routes.
+
 ## Core Features
 
 ### Middleware
@@ -724,3 +771,4 @@ func changePasswordHandler(
 
 
 
+