Improve performance

For the amount these functions get called, std copy is way to expensive
to do. This removes the need for buffer to be copied twice, first to a
std::vector then SmallFixedVector. This also directly copies buffer into
a smallVector without the init overhead smallVector's ctor do. This
result is a massive performance bootst (at least on arm devices).

Also use memcpy since that interestingly seems to be faster on arm
devices, on amd64 they seems to be about the same speed.

ignore directory .vscode

Do break out of while loop

snapcraft buildtime image handling fixes

add config item: lxc.prlimit.nice

remove unused parameter Runtime

Refactor namespace declarations

remove PendingCallCache from ManagementApiSkeleton

README: add kernel modules documentation reference

Use proto2 syntax

use python3