build: swap out equations when publishing to npm

Author: Planeshifter

lib/node_modules/@stdlib/_tools/scripts/publish_packages.js

@@ -1160,6 +1160,10 @@ function publish( pkg, clbk ) {
 			}
 		}
 
+		// Replace GitHub MathJax equations with SVGs:
+		shell( 'find '+dist+' -type f -name \'*.md\' -print0 | xargs -0 perl -0777 -i -pe "s/```math\\n([\\s\\S]+?)\\n```\\n\\n//g"' );
+		shell( 'find '+dist+' -type f -name \'*.md\' -print0 | xargs -0 perl -0777 -i -pe "s/<!-- <div class=\\"equation\\"(.*)(<\\/div>\\s*-->)/<div class=\\"equation\\"$1<\\/div>/sg"' );
+
 		// Replace GitHub links to individual packages with npm links:
 		shell( 'find '+dist+' -type f -name \'*.md\' -print0 | xargs -0 sed -Ei \'/tree\\/main/b; s/@stdlib\\/([^:]*)\\]: https:\\/\\/github.com\\/stdlib-js/@stdlib\\/\\1\\]: https:\\/\\/www.npmjs.com\\/package\\/@stdlib/g\'' );
 

lib/node_modules/@stdlib/_tools/scripts/templates/workflow_publish.yml.txt

@@ -149,6 +149,12 @@ jobs:
           # Add link definition for CLI package to README.md:
           find . -type f -name '*.md' -print0 | xargs -0 perl -0777 -i -pe "s/<section class=\"links\">/<section class=\"links\">\n\n[$escapedPkg]: https:\/\/www.npmjs.com\/package\/$escapedPkg/"
 
+      # Replace GitHub MathJax equations with SVGs:
+      - name: 'Replace GitHub MathJax equations with SVGs'
+        run: |
+          find . -type f -name '*.md' -print0 | xargs -0 perl -0777 -i -pe 's/```math\n([\s\S]+?)\n```\n\n//g'
+          find . -type f -name '*.md' -print0 | xargs -0 perl -0777 -i -pe 's/<!-- <div class="equation"(.*)(<\/div>\s*-->)/<div class="equation"$1<\/div>/sg'
+
       # Replace GitHub links to individual packages with npm links:
       - name: 'Replace all GitHub links to individual packages with npm links'
         run: |

lib/node_modules/@stdlib/_tools/scripts/templates/workflow_publish_cli.yml.txt

@@ -103,6 +103,12 @@ jobs:
           SLUG=${{ github.repository }}
           git push "https://$GITHUB_ACTOR:$GITHUB_TOKEN@github.com/$SLUG.git" --follow-tags
 
+      # Replace GitHub MathJax equations with SVGs:
+      - name: 'Replace GitHub MathJax equations with SVGs'
+        run: |
+          find . -type f -name '*.md' -print0 | xargs -0 perl -0777 -i -pe 's/```math\n([\s\S]+?)\n```\n\n//g'
+          find . -type f -name '*.md' -print0 | xargs -0 perl -0777 -i -pe 's/<!-- <div class="equation"(.*)(<\/div>\s*-->)/<div class="equation"$1<\/div>/sg'
+
       # Replace GitHub links to individual packages with npm links:
       - name: 'Replace all GitHub links to individual packages with npm links'
         run: |