feat: add "Full Name" field to user creation (#13659)

Adds the ability to specify "Full Name" (a.k.a. Name) when
creating users either via CLI or UI.

coderd/database/dbmem/dbmem.go

@@ -322,6 +322,7 @@ func convertUsers(users []database.User, count int64) []database.GetUsersRow {
 			ID:             u.ID,
 			Email:          u.Email,
 			Username:       u.Username,
+			Name:           u.Name,
 			HashedPassword: u.HashedPassword,
 			CreatedAt:      u.CreatedAt,
 			UpdatedAt:      u.UpdatedAt,
@@ -6492,6 +6493,7 @@ func (q *FakeQuerier) InsertUser(_ context.Context, arg database.InsertUserParam
 		CreatedAt:      arg.CreatedAt,
 		UpdatedAt:      arg.UpdatedAt,
 		Username:       arg.Username,
+		Name:           arg.Name,
 		Status:         database.UserStatusDormant,
 		RBACRoles:      arg.RBACRoles,
 		LoginType:      arg.LoginType,