* feat(ci): cross-compile release assets, cache deps
chore(ci): add caching to regular tests
* fix(ci): include cross only in ci env, add note about release assets
* chore: fix Makefile pre-build
* chore: add Makefile command to install depenedncy cargo-make
* chore: update all READMEs with instructions to install dependencies, build and test
* chore: add target to fetch all submodules