add support for reading EPG urls from `x-tvg-url`

[khimaros]

Is your feature request related to a problem? Please describe. i would like to use the iptv-org lists with iptvnator and automatically get EPG data included

Describe the solution you'd like the unified list from iptv-org includes x-tvg-url for all included channels so that the correct information can be surfaced in the program guide.

Describe alternatives you've considered manually adding 10's of EPG urls in the iptvnator UI

Additional context an example from iptv-org M3U follows, it is a single comma separated list of EPG URLs:

#EXTM3U x-tvg-url="https://iptv-org.github.io/epg/guides/ad.xml,https://iptv-org.github.io/epg/guides/ae.xml,https://iptv-org.github.io/epg/guides/af.xml,https://iptv-org.github.io/epg/guides/al.xml,https://iptv-org.github.io/epg/guides/am.xml,https://iptv-org.github.io/epg/guides/ao.xml,https://iptv-org.github.io/epg/guides/ar.xml,https://iptv-org.github.io/epg/guides/at.xml,https://iptv-org.github.io/epg/guides/au.xml,https://iptv-org.github.io/epg/guides/az.xml,https://iptv-org.github.io/epg/guides/ba.xml,https://iptv-org.github.io/epg/guides/be.xml,https://iptv-org.github.io/epg/guides/bf.xml,https://iptv-org.github.io/epg/guides/bg.xml,https://iptv-org.github.io/epg/guides/bh.xml,https://iptv-org.github.io/epg/guides/bj.xml,https://iptv-org.github.io/epg/guides/bn.xml,https://iptv-org.github.io/epg/guides/bo.xml,https://iptv-org.github.io/epg/guides/br.xml,https://iptv-org.github.io/epg/guides/bs.xml,https://iptv-org.github.io/epg/guides/by.xml,https://iptv-org.github.io/epg/guides/ca.xml,https://iptv-org.github.io/epg/guides/cg.xml,https://iptv-org.github.io/epg/guides/ch.xml,https://iptv-org.github.io/epg/guides/cl.xml,https://iptv-org.github.io/epg/guides/cm.xml,https://iptv-org.github.io/epg/guides/cn.xml,https://iptv-org.github.io/epg/guides/co.xml,https://iptv-org.github.io/epg/guides/cr.xml,https://iptv-org.github.io/epg/guides/cy.xml,https://iptv-org.github.io/epg/guides/cz.xml,https://iptv-org.github.io/epg/guides/de.xml,https://iptv-org.github.io/epg/guides/dk.xml,https://iptv-org.github.io/epg/guides/do.xml,https://iptv-org.github.io/epg/guides/dz.xml,https://iptv-org.github.io/epg/guides/ec.xml,https://iptv-org.github.io/epg/guides/ee.xml,https://iptv-org.github.io/epg/guides/eg.xml,https://iptv-org.github.io/epg/guides/es.xml,https://iptv-org.github.io/epg/guides/fi.xml,https://iptv-org.github.io/epg/guides/fo.xml,https://iptv-org.github.io/epg/guides/fr.xml,https://iptv-org.github.io/epg/guides/ga.xml,https://iptv-org.github.io/epg/guides/ge.xml,https://iptv-org.github.io/epg/guides/gh.xml,https://iptv-org.github.io/epg/guides/gq.xml,https://iptv-org.github.io/epg/guides/gr.xml,https://iptv-org.github.io/epg/guides/gt.xml,https://iptv-org.github.io/epg/guides/gu.xml,https://iptv-org.github.io/epg/guides/hk.xml,https://iptv-org.github.io/epg/guides/hn.xml,https://iptv-org.github.io/epg/guides/hr.xml,https://iptv-org.github.io/epg/guides/hu.xml,https://iptv-org.github.io/epg/guides/id.xml,https://iptv-org.github.io/epg/guides/ie.xml,https://iptv-org.github.io/epg/guides/il.xml,https://iptv-org.github.io/epg/guides/in.xml,https://iptv-org.github.io/epg/guides/iq.xml,https://iptv-org.github.io/epg/guides/ir.xml,https://iptv-org.github.io/epg/guides/is.xml,https://iptv-org.github.io/epg/guides/it.xml,https://iptv-org.github.io/epg/guides/jm.xml,https://iptv-org.github.io/epg/guides/jo.xml,https://iptv-org.github.io/epg/guides/jp.xml,https://iptv-org.github.io/epg/guides/ke.xml,https://iptv-org.github.io/epg/guides/kr.xml,https://iptv-org.github.io/epg/guides/kw.xml,https://iptv-org.github.io/epg/guides/kz.xml,https://iptv-org.github.io/epg/guides/lb.xml,https://iptv-org.github.io/epg/guides/lt.xml,https://iptv-org.github.io/epg/guides/lu.xml,https://iptv-org.github.io/epg/guides/md.xml,https://iptv-org.github.io/epg/guides/mk.xml,https://iptv-org.github.io/epg/guides/mo.xml,https://iptv-org.github.io/epg/guides/mt.xml,https://iptv-org.github.io/epg/guides/mw.xml,https://iptv-org.github.io/epg/guides/mx.xml,https://iptv-org.github.io/epg/guides/my.xml,https://iptv-org.github.io/epg/guides/mz.xml,https://iptv-org.github.io/epg/guides/ng.xml,https://iptv-org.github.io/epg/guides/ni.xml,https://iptv-org.github.io/epg/guides/nl.xml,https://iptv-org.github.io/epg/guides/no.xml,https://iptv-org.github.io/epg/guides/nz.xml,https://iptv-org.github.io/epg/guides/pa.xml,https://iptv-org.github.io/epg/guides/pe.xml,https://iptv-org.github.io/epg/guides/pf.xml,https://iptv-org.github.io/epg/guides/ph.xml,https://iptv-org.github.io/epg/guides/pk.xml,https://iptv-org.github.io/epg/guides/pl.xml,https://iptv-org.github.io/epg/guides/pr.xml,https://iptv-org.github.io/epg/guides/pt.xml,https://iptv-org.github.io/epg/guides/py.xml,https://iptv-org.github.io/epg/guides/ro.xml,https://iptv-org.github.io/epg/guides/rs.xml,https://iptv-org.github.io/epg/guides/ru.xml,https://iptv-org.github.io/epg/guides/rw.xml,https://iptv-org.github.io/epg/guides/sa.xml,https://iptv-org.github.io/epg/guides/se.xml,https://iptv-org.github.io/epg/guides/sg.xml,https://iptv-org.github.io/epg/guides/si.xml,https://iptv-org.github.io/epg/guides/sk.xml,https://iptv-org.github.io/epg/guides/sl.xml,https://iptv-org.github.io/epg/guides/sn.xml,https://iptv-org.github.io/epg/guides/sv.xml,https://iptv-org.github.io/epg/guides/sy.xml,https://iptv-org.github.io/epg/guides/td.xml,https://iptv-org.github.io/epg/guides/th.xml,https://iptv-org.github.io/epg/guides/tn.xml,https://iptv-org.github.io/epg/guides/tr.xml,https://iptv-org.github.io/epg/guides/tw.xml,https://iptv-org.github.io/epg/guides/uk.xml,https://iptv-org.github.io/epg/guides/us.xml,https://iptv-org.github.io/epg/guides/uy.xml,https://iptv-org.github.io/epg/guides/ve.xml,https://iptv-org.github.io/epg/guides/xk.xml"

[4gray]

I will need to think conceptually about how to combine this with EPG settings at the global application level.