[PM-24192] Move account recovery logic to command (#6184)

* Move account recovery logic to command
  (temporarily duplicated behind feature flag)

* Move permission checks to authorization handler

* Prevent user from recovering provider member account
  unless they are also provider member

src/Core/Context/ICurrentContext.cs

@@ -1,6 +1,4 @@
-#nullable enable
-
-using System.Security.Claims;
+using System.Security.Claims;
 using Bit.Core.AdminConsole.Context;
 using Bit.Core.AdminConsole.Repositories;
 using Bit.Core.Auth.Identity;
@@ -12,6 +10,14 @@ using Microsoft.AspNetCore.Http;
 
 namespace Bit.Core.Context;
 
+/// <summary>
+/// Provides information about the current HTTP request and the currently authenticated user (if any).
+/// This is often (but not exclusively) parsed from the JWT in the current request.
+/// </summary>
+/// <remarks>
+/// This interface suffers from having too much responsibility; consider whether any new code can go in a more
+/// specific class rather than adding it here.
+/// </remarks>
 public interface ICurrentContext
 {
     HttpContext HttpContext { get; set; }
@@ -59,8 +65,20 @@ public interface ICurrentContext
     Task<bool> EditSubscription(Guid orgId);
     Task<bool> EditPaymentMethods(Guid orgId);
     Task<bool> ViewBillingHistory(Guid orgId);
+    /// <summary>
+    /// Returns true if the current user is a member of a provider that manages the specified organization.
+    /// This generally gives the user administrative privileges for the organization.
+    /// </summary>
+    /// <param name="orgId"></param>
+    /// <returns></returns>
     Task<bool> ProviderUserForOrgAsync(Guid orgId);
+    /// <summary>
+    /// Returns true if the current user is a Provider Admin of the specified provider.
+    /// </summary>
     bool ProviderProviderAdmin(Guid providerId);
+    /// <summary>
+    /// Returns true if the current user is a member of the specified provider (with any role).
+    /// </summary>
     bool ProviderUser(Guid providerId);
     bool ProviderManageUsers(Guid providerId);
     bool ProviderAccessEventLogs(Guid providerId);