* 🐛 Bail out when no packages are found with default solvers
Checking packages is more tricky when a resolver is set. Resolvers
are capable of mutating the user request and remove part of the
constraints in order to resolve a specific solution.
This had the countereffect on a normal solver to not detect correctly
packages when missing from the wanted set and not proposed during
installation.
This should fix all the cases above taking into consideration of
resolvers and adding specific test-cases for it.
* ⚙️ Pin to tag for test image
This commit is multi-fold as it also refactors internally context and logger
as interfaces so it is easier to plug luet as a library externally.
Introduces a garbage collector (related to #227) but doesn't handle yet
parallelism.
Closes#265
The path contains an ending "/" which wouldn't match when we walk dst as
it's not there.
That had the unpleasant effect of creating empty folders in the
destinations
