Construct a (sub)graph with serialized files (`.gsf`, graph serialized format/file)

[yecol]

As titled, this is a successor task of #1587 optimized for this scenario:

• a large graph g1, serialized to files, each file with one label, e.g., v1.gsfv, v2.gsfv, v3....., e1.gsfe, e2.gsfe....
• g1 surely can rebuild from serialized files, when issue-1587 is done.
• now we may want to build a g2, with subset of vertex/edge labels of g1, says, v1.gsfv, v2.gsfv, e2.gsfe...
• an optional approach: build a new graph schema, load data from .gsf files.