The newly added `cargo deny check licenses` command complains about the licenses added in this commit not being explicitly allowed, so add them to the config here. There is no intended change in semantics. Closes #12097
* Add .idea/ to git ignored directories. * Remove redundant newline. * Remove redundant newline. * Remove redundant newlines. * Remove redundant newline. * Remove redundant newline. * Add missing newline at end of file. * Remove redundant newline. * Remove redundant newlines.