Big tile PR (3 carpets, 4 red sands, 1 grass, 5 shuttle floors) (#6864)

Resources/Textures/Tiles/copyright.txt

@@ -6,3 +6,9 @@ bar.png, laundry.png, mime.png, clown.png and kitchen.png are under CC-BY-SA-3.0
 snow.png taken from TG at commit 67a5373b4649937dd63dd94153e05e8506f40a5d
 grass.png taken from TG at commit 73a638214c94da9b8c485f1c75f615cb79770883
 reinforced.png taken from /tg/ at commit https://github.com/tgstation/tgstation/commit/4e2a36fe7e56fad93495adf01c697f4b5de04e90, licensed under CC-BY-SA-3.0
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+ironsand1-4, junglegrass, eightiesred and eighties taken from TG station at https://github.com/tgstation/tgstation/commit/8abb19545828230d92ba18827feeb42a67a55d49
+arcadeblue edited by Peptide90 based on eightiestred from TG.
+shuttleblue, orange, purple, red and white taken from ParadiseSS13 at https://github.com/ParadiseSS13/Paradise/commit/69c831afcd9aef25a2889b507e4f36a3a5fc6def