[PM-22580] Org/User License Codeownership Move (No logic changes) (#6080)

* Moved license models to billing

* Moved LicensingService to billing

* Moved license command and queries to billing

* Moved LicenseController to billing

src/Core/Billing/Services/ILicensingService.cs

@@ -0,0 +1,28 @@
+#nullable enable
+
+using System.Security.Claims;
+using Bit.Core.AdminConsole.Entities;
+using Bit.Core.Billing.Models.Business;
+using Bit.Core.Entities;
+using Bit.Core.Models.Business;
+
+namespace Bit.Core.Billing.Services;
+
+public interface ILicensingService
+{
+    Task ValidateOrganizationsAsync();
+    Task ValidateUsersAsync();
+    Task<bool> ValidateUserPremiumAsync(User user);
+    bool VerifyLicense(ILicense license);
+    byte[] SignLicense(ILicense license);
+    Task<OrganizationLicense?> ReadOrganizationLicenseAsync(Organization organization);
+    Task<OrganizationLicense?> ReadOrganizationLicenseAsync(Guid organizationId);
+    ClaimsPrincipal? GetClaimsPrincipalFromLicense(ILicense license);
+
+    Task<string?> CreateOrganizationTokenAsync(
+        Organization organization,
+        Guid installationId,
+        SubscriptionInfo subscriptionInfo);
+
+    Task<string?> CreateUserTokenAsync(User user, SubscriptionInfo subscriptionInfo);
+}