Player Spawn-point Placement Requirement

There are unfortunate places for players to spawn. Examples include on top of trees, next to woodland mansions (which could be dangerous for newer players), near lava, and in water.

These are all bugs, they arent intentional, but the best way to fix all of these bugs is to set a simple spawn requirement rule: Players spawn on solid ground blocks, in air (above water level), within a suitable biome; trees must make a 14 block clearing around the player, or must have their leaves above 4 blocks from the ground; at least 40 blocks from structures where hostile mobs are spawned. This requirement will be applied to every seed, and all seeds in violation to this should be adjusted to fit this requirement.