fix(selinux): Allow creation of icons for PWAs including folders

[PhysicsIsAwesome]

Trivalent needs to be able to create icons under subfolders of $HOME/.local/share/icons/..., including missing folders in that path.

I decided against simply allowing write access to type data_home_t, because some executables are of this type, to not introduce WX.

Thus I introduced a new type trivalent_data_home_t for files in data_home_t dirs, including the necessary filetrans. It also allows creation of directories of type data_home_t, in case they don't already exist.

I tested installing and uninstalling a PWA.

It also contains a small fix, with missing trivalent_home_cdm_lib_t missing in a gen_require block.

[codacy-production]

Up to standards ✅

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