Build examples + Fix SDL3 examples

[madebr]

No description provided.

[madebr]

The remaining failing SDL3 examples are android symbols, and documentation pages where the example is basically:

    ```c++
    You can add your code example here
    ```

SDL_GL_BindTexture is also failing. Its example is probably way too complicated.

[madebr]

The remaining failing SDL3 examples are android symbols, and documentation pages where the example is basically:

    ```c++
    You can add your code example here
    ```

SDL_GL_BindTexture is also failing. Its example is probably way too complicated.

I removed those example blocks, and it turned out SDL_GL_BindTexture was removed from SDL3. :)

[icculus]

This is cool. :)

[icculus]

Should the #!/usr/bin/env python in extract_example.py use python3 instead? This is probably just needs to work on GitHub Actions, so not a big deal, but on Ubuntu 23.04, it fails if you try to run it with python, which is 2.7.18 in this case.

[madebr]

Should the #!/usr/bin/env python in extract_example.py use python3 instead? This is probably just needs to work on GitHub Actions, so not a big deal, but on Ubuntu 23.04, it fails if you try to run it with python, which is 2.7.18 in this case.

Yeah probably.
I assumed most distributions changed the /usr/bin/python symlink to python3 by now.
The CMake script uses Python3, so it does not really matter.