Changed paths:
M Lib/fontTools/feaLib/variableScalar.py
M Tests/feaLib/variableScalar_test.py
Log Message:
-----------
[feaLib] Add backwards-compat shim for VariableScalar.add_to_variation_store()
Downstream consumers (babelfont, fontFeatures) set .axes on VariableScalar
and call .add_to_variation_store() directly, bypassing feaLib's builder.
Add a thin deprecation shim that delegates to VariableScalarBuilder so
these callers continue working while they migrate to the new API.