refactor text system

[limikael]

The vision is to have a use_font hook. so it would be like:

#[function_component]
fn my_comp(p: MyProps, c:Elements)->Elements {
  let f=use_font(FontSpec::new("thefont").size(10).charset(Charset::Ascii));
  f.get_line_width("blabla") // the with of a line of text
  f.get_paragraph_height("blasdf\nasdfasf",100) // the height of a paragraph, if fit into a width of 100

  apx!{
    <text text="hello" font=f/>
  }
}

currently there is a gpu cache thingy, but it doesn't work well at all. look at:

• https://crates.io/crates/glyph_brush/
• https://docs.rs/glium_text/latest/glium_text/

[limikael]

The gpu cache wasn't that bad, it just needs to update its size dynamically, which it now does...

The syntax for using fonts:

#[function_component]
fn my_comp(p: MyProps, c:Elements)->Elements {
    let f=use_font_data(||include_bytes!("./thefont.ttf"));
    f.get_str_width("blabla",10) // the with of a line of text

    apx!{
       <text text="hello" font=f size=Dp(10.0)/>
    }
}```