Read overview sheet from TAMM and return all stock
Source:R/read_overview.R
read_overview_complete.RdThe stock column of the overview tab uses R-unfriendly approaches to store
season, overall stock name, and individual stocks in the stock column of the TAMM. read_overview_complete
splits these into separate columns: season, primary_stock, and stock.
For three stock (Green, Puyallup, Skokomish), the tamm presents model predictions across two rows with
a single stock name due to merged cells. The stock column in the output preserves this information;
the entry corresponding to the second row has the suffix "_row2".