Simple animation of priority Queue (min heap)

Plan

• add animation for deleting a node
• incorporate huffman encoding
• improve ui and support keyboard

Installation

first we need zig, you can find it on ziglang. Second we need raylib, a graphics library:

1. zig fetch --save=raylib https://github.com/raysan5/raylib/archive/<hash>.tar.gz and replace with appropriate hash
2. add the following to build.zig:

const raylib_dep = b.dependency("raylib", .{
    .target = target,
    .optimize = optimize,
});
exe.linkLibrary(raylib_dep.artifact("raylib"));