Bug located in CAD import

### 🔍 Before submitting the issue

- [X] I have searched among the existing issues
- [X] I am using a Python virtual environment

### 🐞 Description of the bug

While trying to import a Spaceclaim CAD file without defining the cad reader route / without Spaceclaim installed, the error message currently says CAD import error, the error message has to be more intutive .

### 📝 Steps to reproduce

While trying to import a Spaceclaim CAD file without defining the cad reader route / without Spaceclaim installed, the error message currently says CAD import error, the error message has to be more intutive .

### 💻 Which operating system are you using?

Windows

### 📀 Which ANSYS version are you using?

2024R2

### 🐍 Which Python version are you using?

3.10

### 📦 Installed packages

```shell
ansys-meshing-prime==0.6.2
```