Explore lark as replacement for the pyparsing formula parser#124

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pkienzle wants to merge 7 commits intomasterfrom

Commits on Mar 5, 2026

Explore lark as replacement for the pyparsing formula parser
Paul Kienzle
committed

Commits on Mar 6, 2026

improve error display for lark parser
Paul Kienzle
committed
better formatting of invalid valence error
Paul Kienzle
committed
Allow Ang when defining layered samples
Paul Kienzle
committed
check failure text in pyparsing
Paul Kienzle
committed
display and parse unicode superscripts for isotopes
Paul Kienzle
committed
fix tests
Paul Kienzle
committed