add bin/entry2csv.sh tool

We add a new `bin/entry2csv.sh` tool VERSION "1.0 2024-07-14"
that will convert entry `.entry.json` files into 3 CSV files
`author_wins.csv`, `manifest.csv`, and `year_prize.csv`.

The `bin/entry2csv.sh` tool uses `bin/manifest.csv.entry.awk`.
The new `bin/manifest.csv.entry.awk` VERSION is "1.0 2024-07-14".

This tool will be used to convert entry `.entry.json` file into
CSV files suitable for importing into a spreadsheet application
for further processing.

TODO: Write the `bin/csv2entry.sh` tool, for a given entry, to
      convert 3 CSV files into that entry's c`.entry.json` file.

.gitignore

@@ -29,10 +29,15 @@
 /archive/historic/2018
 /archive/historic/2019
 /archive/historic/2020
+author_wins.csv
+author_wins.numbers
 debug.input.md
 debug.output.html
+manifest.csv
+manifest.numbers
 .su[a-z]
 .*.sv[a-z]
 .*.sw[a-z]
-.sw[a-z]
 .tmp.*
+year_prize.csv
+year_prize.numbers