New ocean generation + tropical islands

Add a slider to the world creation menu that allows you to generate your world with a specific amount of ocean. There used to be much larger seas, which was quite fun; now, there are hardly any seas, and all the land is connected. With this addition, you could decide how you want your world to be: featuring large seas or following the current terrain generation style. Setting the slider to 0 would yield the current world generation; 75 would produce the old style; and for those who enjoy sailing, setting it to 100 would create extremely vast seas. This change could also allow for the implementation of tropical islands within these gigantic expanses of water—acting as a sort of oasis complete with trees, wildlife, and a new type of abandoned structure containing crops and basic supplies for setting up a base. The water surrounding the island would be crystal clear, and these islands would only generate in warm oceans.