Google Scholar links for articles

[topepo]

This PR has some post-processing tools for bibtex files that add a LaTeX \href{} entry that points to Google Scholar. This will help people get direct access to references via the journal site or other locations where the reference (or a preprint) is available.

For example, it takes this bibtex entry:

@article{vakayil2022data,
  title={Data twinning},
  author={Vakayil, A and Joseph, V R},
  journal={Statistical Analysis and Data Mining: {The} ASA Data Science Journal},
  volume={15},
  number={5},
  pages={598-610},
  year={2022}
}

and formats it as

@Article{vakayil2022data,
  title = {\href{https://scholar.google.com/scholar?hl=en&as_sdt=0%2C7&q=Data+twinning&as_ylo=2022&as_yhi=2022&btnG=}{Data twinning}},
  author = {A Vakayil and V R Joseph},
  journal = {Statistical Analysis and Data Mining: {The} ASA Data Science Journal},
  volume = {15},
  number = {5},
  pages = {598-610},
  year = {2022},
}

and renders as:

The original reference entries are kept intact; a separate file is written with the link markup.