Improve Error Reporting: The value or constructor is not defined.

When a function is defined after the usage, there is an error `error FS0039: The value or constructor 'X' is not defined`

That's ok, but should help more, if the function is defined somewhere near

#### Repro steps

```fsharp
[]
let main argv =
printfn "Hello World from F#!"
add 1 2
0 // return an integer exit code

let add x y =
x + y
```

give as error

```
Program.fs(8,5): error FS0039: The value or constructor 'add' is not defined. [my.fsproj]
```

#### Expected behavior

Help user understand the function is defined in the wrong place, like

```
The value or constructor 'add' is not defined. There is a function `add` defined later, but functions should be defined before usage in F#.
```

or at least something like (dunno how to write that better)

```
The value or constructor 'add' is not defined. The 'add' value (like a functions or a binding) or constructor should be defined before usage.
```

#### Actual behavior

Correct, but error message can help more

### Additional info

ref https://github.com/Microsoft/visualfsharp/issues/1103