Add basic font rendering to the media crate

[angered-ghandi]

The AOE CD comes with some fonts in the /system/fonts path. Unfortunately, it's not in the game data directory (I'm guessing the installer would add it to the system if necessary).

We'll need to be able to render these fonts to screen for upcoming debug/UI features. As a good first step, we should just integrate with rust-sdl2_ttf in the media crate, and add a simple render_text(&mut self, &str, &Point) function to the Renderer object. For now, it can just be hardcoded to use the arial font from the game disc. We'll want a proper font manager later.

[angered-ghandi]

The rusttype library also looks like it could work, and that would eliminate the need for the SDL2_ttf C library since it's written entirely in Rust.

[phrohdoh]

@RockyTV found https://github.com/ggez/ggez/blob/d9afe7019ce1e0a0a1d3b55dabe7588a95359360/src/graphics.rs#L523 which has been super helpful:

master...Phrohdoh:rusttype

[angered-ghandi]

Nice!

[phrohdoh]

@angered-ghandi thanks!
It isn't very clean at all currently (I have no idea where I can hook into the Renderer from an ECS).

Since you seem to be gone mostly I'll probably spend time working solely on my fork, possibly breaking the GitHub fork relationship if I can get this somewhat stable again (just need to figure out native debugging in vscode [ref: #70]).