Add CheckUserPassword RPC to user.proto

[Feyzanrs]

A new RPC, CheckUserPassword, needs to be added to pkg/proto/model/user.proto. This RPC checks user information and password. Additionally, a new message type, UserWithPassword, needs to be added.

service UserSvc {
    rpc GetUsersByFilter(UserFilter) returns (Users) {}
    rpc CreateUser(User) returns(User)  {}
    rpc DeleteUser(User) returns (User) {}
    rpc UpdateUserRole(User) returns (User) {}
    rpc UpdateUserBase(User) returns (User) {}
    rpc UpdateUserStatus(User) returns (User) {}
    rpc ChangePassword(UserPassword) returns (UserPasswordResult) {}
    rpc CheckUserPassword(UserWithPassword) returns (User) {} // new
}

// this message is new and it will be added like the other messages 
message UserWithPassword {
    User user = 1;
    UserPassword userPassword = 2;
}

Please Note: The comment lines are included here for better understanding and do not need to be added to the actual implementation.