ZIM URLs

Kiwix readers access content the zim:// local custom protocol.

This implies that content provided by ZIM files should be refered with a (absolute or relative) zim:// URL.

These URLs should follow the following format in their absolute formatting:

zim://ZIM_ID/CONTENT_PATH

which would give for example:

zim://14a88498-aad1-2495-c5bc-b767482be49b/why-eyewitnesses-get-it-wrong