Add a get_info method to get GL_VENDOR, GL_RENDERER, GL_VERSION

[uggla]

My laptop is equipped with Nvidia Optimus technology, but I wasn't sure about the renderer being utilized by my macroquad applications. To address this, this pull request introduces a method to retrieve information such as GL_VENDOR, GL_RENDERER, and GL_VERSION. This method allows for the identification and confirmation of the correct GPU being utilized.

By incorporating this code into the application, it will provide the following output based on the renderer being used:

    let info = Info::get_info();

    info!("Vendor: {}", info.vendor);
    info!("Renderer: {}", info.renderer);
    info!("Version: {}", info.version);

 🦉 uggla   main  ~  workspace  rust  fztaosi   cargo run --release
   Compiling miniquad v0.3.15 (/home/uggla/workspace/rust/miniquad)
   Compiling macroquad v0.3.25 (/home/uggla/workspace/rust/macroquad)
   Compiling fztaosi v0.1.0 (/home/uggla/workspace/rust/fztaosi)
    Finished release [optimized] target(s) in 12.02s
     Running `target/release/fztaosi`
Vendor: Intel
Renderer: Mesa Intel(R) HD Graphics 630 (KBL GT2)
Version: 4.6 (Compatibility Profile) Mesa 23.0.3

 🦉 uggla   main  ~  workspace  rust  fztaosi __NV_PRIME_RENDER_OFFLOAD=1 __GLX_VENDOR_LIBRARY_NAME=nvidia cargo run --release
    Finished release [optimized] target(s) in 0.03s
     Running `target/release/fztaosi`
Vendor: NVIDIA Corporation
Renderer: NVIDIA GeForce GTX 1050/PCIe/SSE2
Version: 4.6.0 NVIDIA 530.41.03

[notgull]

How would this be implemented if we decided to add Metal support?

[not-fl3]

I do not have a really strong opinion here, but I feel that this code belongs to a crate/code snippet for a user code.

It would be hard to rebase it on 0.4.0 branch (the one with metal), but as a crate it is OK to have it GL/certain OSes only.