Crowbar floor tiles and placement (#429)

* Adds tile removing behavior to CrowbarComponent.
Add FloorTileItemComponent.
Add genhit.ogg
Add tile.png for testing

* fixes

* Gives ContentTileDefinition a default value for tile item to drop.
Adds a few more tileitems.

* Changes per review request

* move stack.use and if statement

Resources/Prototypes/Tiles/floors.yml

@@ -7,6 +7,7 @@
   footstep_sounds: footstep_carpet
   friction: 0.35
   subfloor: plating
+  item_drop: FloorTileItemCarpet
 
 - type: tile
   name: floor_dark
@@ -17,6 +18,7 @@
   footstep_sounds: footstep_floor
   friction: 0.35
   subfloor: plating
+  item_drop: FloorTileItemDark
 
 - type: tile
   name: floor_elevator_shaft
@@ -117,6 +119,7 @@
   footstep_sounds: footstep_floor
   friction: 0.35
   subfloor: plating
+  item_drop: FloorTileItemSteel
 
 - type: tile
   name: floor_steel_dirty
@@ -147,6 +150,7 @@
   footstep_sounds: footstep_floor
   friction: 0.1
   subfloor: underplating
+  item_drop: FloorTileItemWhite
 
 - type: tile
   name: floor_asteroid_sand