New package: envision-3.2.0

[lkroll]

Testing the changes

• I tested the changes in this PR: YES

New package

• This new package conforms to the package requirements: YES

Local build testing

• I built this PR locally for my native architecture, x86_64-glibc

This PR adds a package for Envision (https://gitlab.com/gabmus/envision) which is otherwise only available as an Appimage. This native package has a couple of benefits like better desktop integration (correct scaling) and working "open folder" buttons which won't be fixed in the Appimage (see https://gitlab.com/gabmus/envision/-/issues/96).

The libclang patch is necessary for the included dependency checker to work in the current release, but is already merged and will therefore not be necessary in the next tagged release, see MR.