Improving read and write speed#101

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tltomi wants to merge 1 commit intoNREL:mainfrom

Commits on Aug 22, 2025

Improving read and write speed, adding gdx.GdxFile.read_single_symbol, and adding disable_gc kwarg to gdx.GdxSymbol.load, read_gdx.to_dataframes, and read_gdx.to_dataframe
tltomi
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