ledger test env

[SWvheerden]

Get up and running with ledger unit tests for CI.
We need to get up and running with ragger and write a few unit tests to test all handles.
Look at the default rust boiler plate app as an example.

[SWvheerden]

We have install scripts added by PR #7694

[SWvheerden]

We probably need to split out ledger to its own repo