Remove inline Javascript

[pavel-karatsiuba]

Javascript was moved from index.html to a separate file.

Fixes #134

[kelson42]

@pavel-karatsiuba ready to review (if then, please put me in reviewer)? Otherwise please rewrite the history, no merge in the feature branch.

[kelson42]

It seems we still have inline javascript (it does not pass in Kiwix JS). I see at least:

<script id='ractive-template' type='text/html'>

on home page

[pavel-karatsiuba]

It seems we still have inline javascript (it does not pass in Kiwix JS). I see at least:

<script id='ractive-template' type='text/html'>

on home page

This script was not dangerous for CSP. But I also moved it to a separated file.

[kelson42]

@Jaifroid We have removed all the inline JS, but this still does not load properly in Kiwix-JS. See https://www.dropbox.com/s/alfulridglnsxkv/phet_fr_2022-12.zim?dl=0. Another problem?

[kelson42]

@Jaifroid Actually it seems that my test was wrong (was testing with JQuery). Works fine. I will merge the PR and let me know if any other problem.

[Jaifroid]

Thank you, this helps with kiwix/kiwix-js#865.