ArcadeRS: Update tutorials for sdl2 0.24 stack

[akien-mga]

Some API changes implied modifications in the code:

• Most sdl2 Renderer drawing methods return Result<(), String>
  and need to be unwrapped
• sdl2 Rect::new no longer returns Result<Option<Rect>> but
  directly Rect.
• sdl2_ttf font loading needs to be done from the ttf context,
  currently worked around by adding it to Phi.

Note: WIP, only reviewed code and articles up to chapter 10.

---

I plan to continue working my way through the tutorials to adapt them all to the 0.24 libraries, but as I am pretty new to Rust, I'd be glad to have some feedback on the solutions I chose to integrate the API changes.

[akien-mga]

I probably don't need to make it public actually; but I'm not sure if it's a good idea to even include it in Phi or if the font setup should be refactored a bit. I might also be missing a lifetime here, not fully familiar with those yet.

[akien-mga]

I've currently reviewed things up to chapter 10 (both code and article text). I'd like to have some feedback on the changes I made in chapter 9 particularly, where the sdl2_ttf API changes needed some important changes. Other solutions might be better from a pedagogical point of view, but I'm still learning rust myself.

[akien-mga]

Now all updated down to chapter 12, one to go :)

[akien-mga]

Now reviewed chapter 13 too, it should be good to go. I've seen that in the meantime the sdl2 0.25 stack was released, so I'll have a look at updating (hopefully there's no API change to handle).

[akien-mga]

Ok, moving to sdl2 0.25 is not trivial as the font API changed again:

error[E0107]: wrong number of lifetime parameters: expected 1, found 0
--> src/phi/mod.rs:37:48
|
37 | cached_fonts: HashMap<(&'static str, i32), ::sdl2_ttf::Font>,
| ^^^^^^^^^^^^^^^^ expected 1 lifetime parameter

Since I'm still not convinced about the font handling used right now, and since I still haven't gotten any feedback from @jadpole and my PRs conflict with most of the development done in the update-arcaders-1.13 branch (that I noticed only once I was almost done with my work), I'll leave it at that for now.

Hopefully it can be useful to other Rust learners who want to go through ArcadeRS with a non-yanked version of SDL2_image :)

[mrspeaker]

On the rust-sdl2-image repo it says "As of rust-sdl2v0.27 this crate is deprecated and its functionality has been moved as a feature in rust-sdl2" - does this mean we can completely skip that yanked dependency anyway now?