UI Improvements (#7)

* Initial version with UI templates

* Implement basic screens

* Linting & bump to 0.3.0

* Tick off some TODOs

custom_components/auth_oidc/helpers.py

@@ -1,6 +1,7 @@
 """Helper functions for the integration."""
 
 from homeassistant.components import http
+from .views.loader import AsyncTemplateRenderer
 
 
 def get_url(path: str) -> str:
@@ -10,3 +11,12 @@ def get_url(path: str) -> str:
 
     base_uri = str(req.url).split("/auth", 2)[0]
     return f"{base_uri}{path}"
+
+
+async def get_view(template: str, parameters: dict | None = None) -> str:
+    """Returns the generated HTML of the requested view."""
+    if parameters is None:
+        parameters = {}
+
+    renderer = AsyncTemplateRenderer()
+    return await renderer.render_template(f"{template}.html", **parameters)