Add more seas with maps

[axelboc]

The new inclusion rules for seas, discussed in #346 and added in #379 are ready to be put into application! 🎉 As discussed previously, the limits to use for the maps are the ones defined by the IHO in its 2002 draft of Limit of Oceans and Seas.

Seas to be added

• [ ] Andaman Sea
• [ ] Arafura Sea
• [ ] Baffin Bay
• [x] Banda Sea #388
• [x] Barents Sea #388
• [ ] Beaufort Sea
• [ ] Bering Sea
• [ ] Bismarck Sea
• [x] Celebes Sea #388
• [ ] Chukchi Sea
• [x] East China Sea #388
• [ ] Great Australian Bight
• [ ] Greenland Sea
• [ ] Gulf of Aden
• [x] Gulf of Alaska #388
• [x] Gulf of Guinea #388
• [ ] Gulf of Saint Lawrence
• [ ] Ionian Sea
• [ ] Java Sea
• [ ] Kara Sea
• [ ] Laccadive Sea
• [ ] Laptev Sea
• [ ] Molucca Sea
• [x] North Sea #388
• [ ] Ross Sea
• [ ] Scotia Sea
• [x] Sea of Okhotsk #388
• [ ] Seram Sea
• [ ] Solomon Sea
• [ ] Sulu Sea
• [x] Timor Sea #388
• [ ] Tyrrhenian Sea
• [ ] Weddell Sea

Seas to be removed

• [ ] White Sea
• [ ] Denmark Strait

[aplaice]

FWIW I have more-or-less ready maps for some of these already ("defined" here)), but I'll need to regenerate them (I think they were created by an old version of my script) and they'll need to be reviewed (whether they're panned correctly, whether the limits are correct etc.), ideally double-checked by both me and somebody else.

[axelboc]

That's awesome!! Happy to help review them. I'm glad the IHO document has maps :grin: