chore(git): Set api resources as always lf in git

Though it's convenient for windows devs to have autocrlf set, the files in api/opentrons/resources
_must_ always have lf, including locally, since they are interpreted by bash on the robot. Setting
text eol=lf here is like setting core.autocrlf to input.

Closes #2305

.gitattributes

@@ -1,2 +1,5 @@
 # Set the default behavior, in case people don't have core.autocrlf set.
 * text=auto
+# But the scripts in the api resources directory must always have lf
+# including in the working tree in case the user does a push-api
+./api/opentrons/resources/** text eol=lf