Restructure intro.rst and other pages for data warehouse#2912

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aesharpe wants to merge 2 commits intocreate-naming-convention-docsfrom create-naming-convention-docs-austen

+180-139

Commits on Oct 2, 2023

Restructure intro docs page and README to accommodate data warehouse info. Add three components of PUDL description
aesharpe
committed

Commits on Oct 4, 2023

Update plant_function values in csv to match those in the table_dimensions_ferc1 table
aesharpe
committed