feat: Update gitignore

- Add .idea directory
- Remove duplicates

.gitignore

@@ -5,6 +5,9 @@ reports/**
 source/art/sprites/
 source/art/images/sprite.*
 
+# IDE
+.idea/
+
 # https://gist.github.com/octocat/9257657
 ###################
 ###################
@@ -44,8 +47,6 @@ source/art/images/sprite.*
 ._*
 .Spotlight-V100
 .Trashes
-ehthumbs.db
-Thumbs.db
 
 # https://github.com/github/gitignore
 ###################
@@ -86,15 +87,10 @@ $RECYCLE.BIN/
 # Icon must end with two \r
 Icon
 
-# Thumbnails
-._*
-
 # Files that might appear in the root of a volume
 .DocumentRevisions-V100
 .fseventsd
-.Spotlight-V100
 .TemporaryItems
-.Trashes
 .VolumeIcon.icns
 .com.apple.timemachine.donotpresent
 
@@ -125,7 +121,6 @@ https://github.com/github/gitignore/blob/master/Global/Linux.gitignore
 ###################
 # Logs
 logs
-*.log
 npm-debug.log*
 yarn-debug.log*
 yarn-error.log*