[Lazarus] SynEdit highlighter for Markdown

[Michael Van Canneyt]

On Thu, 5 Jan 2023, Andrew Haines via lazarus wrote:

> Hi, I attached a highlighter I made for Markdown. I like to use this in my 
> projects to plan things.
>
> It seems to work fine with any attribute that only requires a single line. I 
> tried and failed to make multiline fenced code work. I'm sure there is just 
> something I wasn't understanding.
>
> ```
>
> multiline
>
> code
>
> block
>
> ```
>
>
> Indenting works though.

Nice start, I will add it to my IDE, awaiting the 'official' addition to
lazarus :-)

Given the many dialects in markdown (specially for multiline/continuation things), 
it'll be interesting to see how it reacts on them :)

Michael.