Use Lua as a config file language (#1010)

## What are the changes about?

Adds zlua for running Lua code as the configuration file.
Missing as of this time:
- ~~Parsing custom binds and labels~~
- ~~Fix memory leaks~~
- ~~Investigate issue with animation colours~~
- ~~Add examples and default config~~

## What existing issue does this resolve?

[#976](https://codeberg.org/fairyglade/ly/issues/976)

## Pre-requisites

- [ ] I have tested & confirmed the changes work locally
- [ ] I have run `zig fmt` throughout my changes

Reviewed-on: https://codeberg.org/fairyglade/ly/pulls/1010
Reviewed-by: AnErrupTion <anerruption+codeberg@disroot.org>

src/animations/Lua.zig

@@ -8,7 +8,7 @@ const Allocator = std.mem.Allocator;
 const InfoLine = @import("../components/InfoLine.zig");
 const Lang = @import("../config/Lang.zig");
 
-const zlua = @import("zlua");
+const zlua = ly_ui.ly_core.zlua;
 
 const ly_lua = @embedFile("ly.lua");