Fill in the rest of the owl (basic impl done)

And that's the program, all finished and working as intended.

Step 1: boiler plate.
Step 2: Everything else.

The program isn't that complicated, so I didn't really feel the need to
spread it out over several commits.

Cargo.toml

@@ -5,3 +5,8 @@ edition = "2024"
 
 [dependencies]
 bevy = "0.16"
+rand = "0.9.2"
+rand_chacha = "0.9.0"
+
+[features]
+dynamic_linking = ["bevy/dynamic_linking"]