Improved config options for OIDC (#9)

Added many new configuration options, including claim configuration and client_secret/confidential client support. Also enables user linking & creates person entries upon first sign in.

custom_components/auth_oidc/views/loader.py

@@ -16,7 +16,9 @@ class AsyncTemplateRenderer:
     """An asynchronous template renderer that caches rendered templates."""
 
     def __init__(self, template_dir: str = None):
-        self.template_dir = template_dir or path.dirname(path.abspath(__file__))
+        self.template_dir = template_dir or path.join(
+            path.dirname(path.abspath(__file__)), "templates"
+        )
 
     async def fetch_templates(self) -> None:
         """Fetches all HTML files from the template directory."""

custom_components/auth_oidc/views/templates/welcome.html

@@ -18,7 +18,7 @@
     <div>
         <button id="oidc-login-btn"
             class="w-full py-2 px-4 bg-blue-500 text-white font-semibold rounded-lg shadow-md hover:bg-blue-700 focus:outline-none focus:ring-2 focus:ring-blue-400 focus:ring-opacity-75">
-            Login with OpenID Connect (SSO)
+            Login with {{ name }}
         </button>
 
         <div role="status" id="loader" class="items-center justify-center flex hidden">