pycharm-community-eap:
- Seems to use "pycharm-community-eap" to name files
- Doesn’t use /usr/bin at all

pycharm-eap:
- Uses "pycharm-eap" to name files, incl. /usr/bin/pycharm-eap

pycharm-community-jre-aarch64:
- Doesn’t exist anymore

Building things belongs in build() in the PKGBUILD and placing them in
the filesystem belongs in package() and removing package files belongs
to the package manager… none of these are the .install files, so
removing the .install files in favour of moving these things into the
PKGBUILD’s functions.