Sniper insertion point on Depot Intel Retrieval

Adds an additional insertion point across the river for sniping.

Current limitations:

• []Cannot get back to intended player area without workarounds like going back to ready room and getting respawned by admin.

  (This can probably be fixed with a few lines of Lua, though)[]AI is  unaware that player can be on the other side of the river so, they'll never shoot at you, at least from my experience.

  Also, they may start running along the shore possibly, due to some logic telling them that they can close in on you like this. If you managed to make AI shoot at you please, let me know how you did it.

• Bad graphics and small playable space.

  This area was never meant to be playable nor meant to be made such by some idiot. All of the models and textures are of reduced quality since, normally they are seen only from a far. Moreover, polygons there don't have collision so, collision blocks had to be placed manually, including those you walk on. I didn't want for characters to clip through the ground or float in the air so, ground's geometry had to be tediously recreated. (You can do the rest of the shore if you are masochist or slap one huge collision block if you don't care about floating and clipping)