Fix logo image on crates.io (#160)

This moves the logo into the crate's own assets folder so that
crates.io (and GitHub) can find it and link to it.

It leaves the Hyperion image since that's referenced by absolute
URL rather than a path and moving it would break things that refer
to it in the current location.

README.md

@@ -1,4 +1,4 @@
-# ![Flecs](assets/flecs_rust_logo.png)
+# ![Flecs](flecs_ecs/assets/flecs_rust_logo.png)
 
 [![Generic badge](https://img.shields.io/badge/Flecs_Version-4.0.0-E56717.svg)](https://github.com/SanderMertens/flecs/releases)
 [![License](https://badgen.net/pypi/license/pip/)](https://github.com/Indra-db/Flecs-Rust/blob/master/LICENSE)

flecs_ecs/Cargo.toml

@@ -9,6 +9,8 @@ description = "Rust API for the C/CPP flecs ECS library <https://github.com/Sand
 keywords = ["ecs", "flecs", "ECS", "game-development", "gamedev"]
 categories = ["game-development", "api-bindings", "simulation", "data-structures"]
 
+exclude = ["assets/"]
+
 [lints] 
 workspace = true
 

flecs_ecs/README.md

@@ -1,4 +1,4 @@
-# ![Flecs](assets/flecs_rust_logo.png)
+# ![Flecs](flecs_ecs/assets/flecs_rust_logo.png)
 
 [![Generic badge](https://img.shields.io/badge/Flecs_Version-4.0.0-E56717.svg)](https://github.com/SanderMertens/flecs/releases)
 [![License](https://badgen.net/pypi/license/pip/)](https://github.com/Indra-db/Flecs-Rust/blob/master/LICENSE)