[SM-919] Add project people access policy management endpoints (#3285)

* Expose access policy discriminators

* Add people policy model and auth handler

* Add unit tests for authz handler

* Add people policies support in repo

* Add new endpoints and request/response models

* Update tests

src/Core/SecretsManager/Models/Data/PeopleGrantees.cs

@@ -0,0 +1,22 @@
+namespace Bit.Core.SecretsManager.Models.Data;
+
+public class PeopleGrantees
+{
+    public IEnumerable<UserGrantee> UserGrantees { get; set; }
+    public IEnumerable<GroupGrantee> GroupGrantees { get; set; }
+}
+
+public class UserGrantee
+{
+    public Guid OrganizationUserId { get; set; }
+    public string Name { get; set; }
+    public string Email { get; set; }
+    public bool CurrentUser { get; set; }
+}
+
+public class GroupGrantee
+{
+    public Guid GroupId { get; set; }
+    public string Name { get; set; }
+    public bool CurrentUserInGroup { get; set; }
+}

src/Core/SecretsManager/Models/Data/ProjectPeopleAccessPolicies.cs

@@ -0,0 +1,27 @@
+using Bit.Core.SecretsManager.Entities;
+
+namespace Bit.Core.SecretsManager.Models.Data;
+
+public class ProjectPeopleAccessPolicies
+{
+    public Guid Id { get; set; }
+    public Guid OrganizationId { get; set; }
+    public IEnumerable<UserProjectAccessPolicy> UserAccessPolicies { get; set; }
+    public IEnumerable<GroupProjectAccessPolicy> GroupAccessPolicies { get; set; }
+
+    public IEnumerable<BaseAccessPolicy> ToBaseAccessPolicies()
+    {
+        var policies = new List<BaseAccessPolicy>();
+        if (UserAccessPolicies != null && UserAccessPolicies.Any())
+        {
+            policies.AddRange(UserAccessPolicies);
+        }
+
+        if (GroupAccessPolicies != null && GroupAccessPolicies.Any())
+        {
+            policies.AddRange(GroupAccessPolicies);
+        }
+
+        return policies;
+    }
+}