Initial work on evolver in native pvector implementation
Evolver with support for modifications is the tail
More native support for evolver. Update elements in trie
More evolver tests and some cleanup
Fix ref count issues in native evolver
More refcount fixing
Native evolver append
Extend in native evolver
Native evolver on par with the python implementation feature wise
Some cleanups in native evolver implementation
pvectorc cleanups
mset in native vector
Evolver len
Updated TODO list to reflect recent work