Example bug

[bruceunx]

two example bugs:

1. in table.zig

    const users_buf = try alloc.dupe(User, users[0..]);
    defer alloc.free(users_buf); // fix memory leak

2 in fuzzy.zig

    filtered: std.ArrayList(vxfw.RichText),
    list_view: vxfw.ListView,
    text_field: vxfw.TextField,

    /// Used for filtered RichText Spans and result
    arena: std.heap.ArenaAllocator,
    filtered: std.ArrayList(vxfw.RichText), // dup