Lack of generics support is blocking various dependency upgrades,
so this unblocks that.
Temporarily disabled `checklocks` linter until it is fixed upstream.
* feat(repository): added bigmap Set and Map backed by custom on-disk hashtable
* additional test coverage for corner cases
* profile flags
* exclude bigmapbench from code coverage
* refactored based on conversation with Julio
The concern was that values stored on disk are not encrypted.
* bigmap.Map - implements encryption of values
* bigmap.Set - stores keys only, so no encryption necessary
* bigmap.internalMap - used as backing structure for Map and Set
* implemented benchmark with values
