Move csharprepl storage from roaming to local appdata

[waf]

Fixes #391

For new users, we'll default to local appdata.

For users who already have settings stored in roaming appdata, we continue to use roaming appdata. Those users can either move their .csharprepl directory from roaming to local by themselves, or they can delete it and next time csharprepl starts it will use the local appdata location.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.1%. Comparing base (bb1399c) to head (7d3cddd).

Additional details and impacted files

@@          Coverage Diff          @@
##            main    #484   +/-   ##
=====================================
  Coverage   79.1%   79.1%           
=====================================
  Files        116     116           
  Lines       8597    8601    +4     
  Branches    1277    1278    +1     
=====================================
+ Hits        6802    6806    +4     
  Misses      1358    1358           
  Partials     437     437           

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