feat!: change token management for users to be outside the scope of the lib.

BREAKING CHANGE:
Use Services.AddHttpClient("AuthClient", (sp, httpClient) => ...).AddUserAccessTokenHandler(); or any other kinds of token management, and then use "AuthClient" to inform lib which client it should use.
CgScriptOptions.Site is no longer used. Set the BaseAddress of the httpClient in the above config to decide which site to call.

Author: davhdavh

README.md

@@ -53,8 +53,7 @@ Add the following to the appsettings.json with the scopes you made above and you
   "SaveTokens": true
 },
 "CatglobeApi": {
-  "FolderResourceId": deploymentFolderId,
-  "Site": "https://mysite.catglobe.com/"
+  "FolderResourceId": deploymentFolderId
 }
 ```
 
@@ -105,18 +104,20 @@ services.AddAuthentication(SCHEMENAME)
             oidcOptions.TokenValidationParameters.NameClaimType = "name";
          })
         .AddCookie(CookieAuthenticationDefaults.AuthenticationScheme);
-services.AddCgScript(builder.Configuration.GetSection("CatglobeApi"), builder.Environment.IsDevelopment());
+services.AddHttpClient("AuthClient", (sp, httpClient) => {
+                  var site = sp.GetService<IOptionsMonitor<OpenIdConnectOptions>>()?.Get(SCHEMENAME).Authority;
+                  httpClient.BaseAddress = string.IsNullOrEmpty(site) ? null : new(site);
+                  httpClient.DefaultRequestHeaders.Accept.Clear();
+                  httpClient.DefaultRequestHeaders.Accept.Add(new("application/json"));
+               })
+              .AddUserAccessTokenHandler(); //<-- here we use Duande for token management
+services
+   .AddBlazorServerAccessTokenManagement<HybridCacheTokenStore>()
+   .AddOpenIdConnectAccessTokenManagement();
+
+services.AddCgScript(builder.Configuration.GetSection("CatglobeApi"), builder.Environment.IsDevelopment(), "AuthClient");
 ```
 
-Optionally, setup refresh-token refreshing as part of the cookie handling:
-```csharp
-services.AddSingleton<CookieOidcRefresher>();
-services.AddOptions<CookieAuthenticationOptions>(CookieAuthenticationDefaults.AuthenticationScheme).Configure<CookieOidcRefresher>((cookieOptions, refresher) => {
-   cookieOptions.Events.OnValidatePrincipal = context => refresher.ValidateOrRefreshCookieAsync(context, SCHEMENAME);
-});
-```
-You can find the CookieOidcRefresher [here](https://github.com/dotnet/blazor-samples/blob/main/9.0/BlazorWebAppOidc/BlazorWebAppOidc/CookieOidcRefresher.cs).
-
 Before `app.Run`, add the following:
 ```csharp
 {