feat: automatic property migration from old schema to new schema

[rot1024]

No description provided.

[codecov]

Codecov Report

Merging #85 (9b8a7ed) into main (8b0c250) will increase coverage by 2.36%.
The diff coverage is 88.15%.

❗ Current head 9b8a7ed differs from pull request most recent head 4f8ef14. Consider uploading reports for the commit 4f8ef14 to get more accurate results

@@            Coverage Diff             @@
##             main      #85      +/-   ##
==========================================
+ Coverage   32.58%   34.94%   +2.36%     
==========================================
  Files         294      279      -15     
  Lines       18906    17658    -1248     
==========================================
+ Hits         6160     6171      +11     
+ Misses      11938    10681    -1257     
+ Partials      808      806       -2     

Impacted Files	Coverage Δ
pkg/dataset/dataset.go	32.75% <0.00%> (-3.10%)	⬇️
pkg/dataset/loader.go	0.00% <0.00%> (ø)
pkg/dataset/schema.go	17.02% <0.00%> (-1.17%)	⬇️
pkg/dataset/graph_loader.go	27.77% <50.00%> (+27.77%)	⬆️
pkg/dataset/migrator.go	94.33% <94.33%> (ø)
pkg/dataset/graph_pointer.go	100.00% <100.00%> (ø)
pkg/dataset/pointer.go	100.00% <100.00%> (ø)
pkg/dataset/value_optional.go	88.37% <100.00%> (ø)
pkg/property/value_optional.go	95.34% <100.00%> (ø)
pkg/value/optional.go	100.00% <100.00%> (ø)
... and 67 more

[rot1024]

Refer to #113