Updates to methods/tool tips and edits to work with updated IV dataset

[delwen]

• Updated text of the methods page, methods tooltips, and limitation tooltips across all pages (comments from team are integrated)
• Fix small bug with selection of tooltips
• Made updates to work with changes to the IV dataset (https://github.com/maia-sh/intovalue-data)
  • Update prep-intovalue script:
  • Read in trials.rds (filename change)
  • Re-create has_publication variable as no longer exists in the IV dataset (TODO: short term fix based on us only considering journal publications for publication-based metrics, to be adapted)
  • Change has_ft_pdf to has_ft across all relevant scripts
  • Change has_iv_trn_ft_pdf to has_iv_trn_ft across all relevant scripts