Added widget for messenger max

[KarelWintersky]

• added MAX Messenger widget
• added optional svgIconRaw key for widget definition (required for MAX)
• added example.html
• updated README

[KarelWintersky]

Unfortunately, the svgIconRaw key is required in widget definitions. The current library implementation and the svgIconPath key only allow icons consisting of a single

<path d="...">

element, excluding even a fill, let alone a gradient or additional elements (circles, squares, etc.).

Modern icons are somewhat more complex than a simple "closed vector path," so we had to add an optional svgIconRaw key to the widget definition, which allows us to define the entire SVG icon.

In the case of Messenger Max (let's leave aside political arguments; business requirements are business requirements), the size increase is insignificant. 1833 bytes for maxmessenger.js versus 4414 for viber.js or 2896 for reddit.js.

I've modified the code so that svgIconPath takes priority. If it's missing, svgIconRaw is expected. If not, an empty string is substituted.

For testing, I added example.html , which uses the compiled "release" version of the library.

I wasn't able to build the library with shadow.styl exported to likely.css, but I have an excuse: I'm not a front-end developer, but a back-end developer, and I use a completely different stack.

[NikolayRys]

Hi, thanks for the submission, I'll take a look at it soon