Generate plaintext versions of markdown docs of interest

Signed-off-by: Y. Meyer-Norwood <106889957+norwd@users.noreply.github.com>

.github/workflows/build.yml

@@ -127,12 +127,15 @@ jobs:
         run: |
           make -f - << \EOF
 
-          all: $(patsubst %.md,%.html,$(wildcard *.md */*.md */*/*.md))
+          all: $(patsubst %.md,%.html,$(wildcard *.md */*.md */*/*.md)) humans.txt
           	rm -f header.html
 
           %.html: %.md
           	pandoc --metadata-file=authors.yaml --template=GitHub.html5 --include-in-header=header.html --from markdown+yaml_metadata_block+backtick_code_blocks+fenced_code_attributes+inline_notes+emoji-implicit_figures --to html --standalone $< --output $@
 
+          %.txt: %.md
+          	pandoc -f markdown -t plain --wrap=none $< --output $@
+
           EOF
 
       - name: "Create redirect HTML files"