Initialize the editor

Let's open main.zig and initialize the editor. Add this to the main() function:

    _ = allocator;

    var e = try t.Editor.init(allocator, try ansi.getWindowSize());
    defer e.deinit();

    var args = std.process.args();
    _ = args.next(); // ignore first arg

    try e.startUp(args.next()); // possible file to open

If you remember, the Editor.init() function had this signature:

pub fn init(allocator: std.mem.Allocator, screen: t.Screen) !Editor

which means that, besides an allocator, it wants to know the size of the screen, which is what getWindowSize() fetches.

If the ansi and types modules aren't being imported, add them to the constants.

const t = @import("types.zig");
const ansi = @import("ansi.zig");

Next we process the command line arguments, we skip the first one, since it's the name of our executable, finally we start up the editor passing the second argument, which could be null.