Mention LuaRocks haxe-deps package

There's this handy package for the Haxe lua target dependencies:

https://luarocks.org/modules/jdonaldson/haxe-deps

The Haxe manual page doesn't mention it though:

https://haxe.org/manual/target-lua-getting-started.html

Open the Haxe manual's target-Lua getting-started page and compare its dependency guidance with the LuaRocks haxe-deps package linked in the issue. Add a mention and link for the package, then verify that the manual clearly presents it as an option and the link works.

Written by the indexing model from the issue text.