Use template engine in the Redoc decorators

[netmilk]

Please, let's come up with a template engine for the Redoc Decorators enriching the Operation and Tag description with links to the JS/Py Client references.

This works, but I find it a little hard to read coming from react. I suggest using some kind of templating here, instead of appending to a string if possible.

prepend = `
<span style="float: right;">
    ${pyLink && '<a href="${pyLink}" target="_blank" rel="noopener noreferrer">Python doc</a>'}
    ...
</span>
`;

Originally posted by @Jkuzz in #81 (comment)