Replace inline links for template version

[bergden-resonai]

Description

As I wrote here, there are a ton of explicit html-type links in the docs, which makes page.js less effective in managing all these links
This PR includes:
Replacing:
<a href="([\w\p{L}:/.\-_()?#=!~]+)" target="_blank">([\w\p{L}:/.\-_'\s]+)</a>
For:
[link:$1 $2]

And replacing:
<a href="([\w\p{L}:/.\-_()?#=!~]+)">([\w\p{L}:/.\-_'\s]+)</a>
For:
[link:$1 $2]

As I wrote in the above comment, I'm not sure what to do with the slightly more complicated variants like:

1. 16 occurences of links with & (example)
   (will require adjusting the regex in code.js)
2. 169 links with rel= (example)
3. 9 examples of a link a line break between the and content (same example as (2))
4. More?? (I searched using <a.*>\s*([\w\p{L}:/.\-_'\s]+)\s*</a> and couldn't find anything else relevant - only internal links using id="")

Testing URL

This contribution is funded by Resonai