feat: add aliases for custom layout of notification banner

[JarKz]

Motivation

To avoid any duplication of declarations, need to introduce alias keyword for custom layout. It will make the declaration more clean than earlier, also using simple words will simplify understanding the meaning of layout.

Related issues

Closes #75

Changes

• Added derive for GenericBuilder.
• Added safe check in text-compile because the empty lines will adds until available space won't remains.
• Implemented alias keyword for custom layout definition.
• Extended GenericBuilder by adding associated builders using macro attribute use_gbuilder which should help conversion of custom layout into widgets.

Syntax of aliases

Alias is like a variable but it stores metadata of Widget or Type Value. The metadata are reusable and overrideable if needed. All of aliases should be defined before main Widget. Here's an example:

alias Center = Alignment(horizontal = center, vertical = center)
alias CenteredText = Text(justification = center)
alias ItalicCenteredText = CenteredText(style = italic)

alias Title = ItalicCenteredText(kind = title)
alias Body = Text(kind = body, justification = left)

alias Row = FlexContainer(direction = horizontal)
alias Column = FlexContainer(direction = vertical)

Row(
  alignment = Center(),
) {
  Image()
  Column(
    alignment = Center(vertical = start), // We can override the Center alias
  ) {
    Title(font_size = 22)
    Body(font_size = 18)
  }
}

Addition

With it also updated tree-sitter parser at noti-rs/tree-sitter-noti@783911e.
Updated NeoVim plugin noti.nvim: noti-rs/noti.nvim@cfe3099.