* packaging: update test

* packaging: test pkgconfig

* ci: fix path

* ci: fix test

* cmake: fix path

* cmake: fix typo

* cmake: export variables

* test/packaging: add test for FetchContent

* cmake: sync submodule

* ci: run external cmake example

* ci: fix

* ci: fix GIT_TAG

* ci: fix branch name

* ci: fix branch name extraction

* ci: fix git url