Introduce extension:iframe

[kelson42]

This is necessary in following wikis:

• wiki.kiwix.org
• Wiki.openzim.org

To create page base on widget of library.kiwix.org, see kiwix/libkiwix#585

Please create a key for library.kiwix,org and dev.library.kiwix.org, more details at https://www.mediawiki.org/wiki/Extension:Iframe

[rgaudin]

Done.

Keys are library and dev.library

Sample wikicode:

<iframe key="library" level="" path="mali-pour-les-nuls_fr_all/" />

Note: path must not start with a /.

[kelson42]

@rgaudin Thank you.
@juuz0 You could test it with dev.library.kiwix.org once kiwix/libkiwix#797 will be merged.

[juuz0]

Thanks!