[Sky Island] Upgrade central skylight missions and mapgen

[Standing-Storm]

Summary

Mods "[Sky Island] Upgrade central skylight missions and mapgen"

Purpose of change

As your central room gets bigger and bigger, that one-square skylight looks pretty small.

Describe the solution

Adds missions, mapgen, crafting, etc. to allow increasing the size of the central skylight.

Describe alternatives you've considered

Testing

Big skylight:

Additional context

[github-actions]

Spell checker encountered unrecognized words in the in-game text added in this pull request. See below for details.

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• The central skylight should be enormous to allow in as much light as possible. Time to get to work.\nA new recipe has been learned. Craft this artifact to permanently upgrade the island.\n\nNew Structure: Central Skaylight 4. Expand the central skylight to very generous dimensions.

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• If the word is normally in all lowercase, such as the noun word or the verb does, add it in its lower-case form; if the word is a proper noun, such as the surname George, add it in its initial-caps form; if the word is an acronym or has special letter case, such as the acronym CDDA or the unit mW, add it by preserving the case of all the letters. A word in the dictionary will also match its initial-caps form (if the word is in all lowercase) and all-uppercase form, so a word should be added to the dictionary in its normal letter case even if used in a different letter case in a sentence.
• For a word to be added to the dictionary, it should either be a real, properly-spelled modern American English word, a foreign loan word (including romanized foreign names), or a foreign or made-up word that is used consistently and commonly enough in the game. Intentional misspelling (including eye dialect) of a word should not be added unless it has become a common terminology in the game, because while someone may have a legitimate use for it, another person may spell it that way accidentally.