lix large file/ binary file support

[janfjohannes]

Context/Problem

git has a limit of filesize of about 10 mb after which things get slow and awkward and a big next jump of 100 - 500 mb where things start to really hurt and a hard limit of 2gb if things like lfs are used, but which leads to lots of pain for enabling and interop with other tooling.

we need a nice solution for this in lix inspired by dvc but integrated into the lix sdk.

Proposal