Feature: Add the ability to parse text into spans - #140

Line::fromSpans([
    Span::fromString('Hello ')->black()->onBlue()->bold()->italic(),
    Span::fromString('Wor')->white()->onRed()->crossedout(),
    Span::fromString('ld')->black()->onBlue()->bold()->italic(),
    Span::fromString(' PHP'),
]),

Line::parse('<fg=black;bg=blue;options=bold,italic>Hello <fg=white;bg=red;options=crossedout>Wor</>ld</> PHP')

// Style methods
$title = Title::fromLine(Line::fromSpans([
    Span::fromString('Titles')->red()->onWhite(),
]));

// Parsing instead:
$title = Title::parse('<fg=red;bg=white>Titles</>');