chore: added sentences-per-line to markdownlint (#76)

Author: JoshuaKGoldberg

.github/CONTRIBUTING.md

@@ -10,8 +10,7 @@ This project contains a [Contributor Covenant code of conduct](./CODE_OF_CONDUCT
 
 ## Reporting Issues
 
-Please do [report an issue on the issue tracker](https://github.com/JoshuaKGoldberg/template-typescript-node-package/issues/new/choose) if there's any bugfix, documentation improvement, or general enhancement you'd like to see in the repository!
-Please fully fill out all required fields in the most appropriate issue form.
+Please do [report an issue on the issue tracker](https://github.com/JoshuaKGoldberg/template-typescript-node-package/issues/new/choose) if there's any bugfix, documentation improvement, or general enhancement you'd like to see in the repository! Please fully fill out all required fields in the most appropriate issue form.
 
 ## Sending Contributions
 

.markdownlintignore

@@ -1,2 +1,3 @@
+.github/CODE_OF_CONDUCT.md
 dist/
 node_modules/

package.json

@@ -25,6 +25,7 @@
 		"pnpm-deduplicate": "^0.4.0",
 		"prettier": "^2.7.1",
 		"semantic-release": "^19.0.5",
+		"sentences-per-line": "^0.2.1",
 		"ts-prune": "^0.10.3",
 		"typescript": "^4.8.4",
 		"vitest": "^0.23.4"
@@ -43,8 +44,8 @@
 		"build": "tsc",
 		"format": "prettier \"**/*\" --ignore-unknown",
 		"format:write": "pnpm format --write",
-		"lint": "npx eslint . --max-warnings 0 --report-unused-disable-directives",
-		"lint:md": "npx markdownlint \"**/*.md\" \".github/**/*.md\"",
+		"lint": "eslint . --max-warnings 0 --report-unused-disable-directives",
+		"lint:md": "markdownlint \"**/*.md\" \".github/**/*.md\" --rules sentences-per-line",
 		"lint:package": "npmPkgJsonLint .",
 		"lint:packages": "pnpm-deduplicate --list",
 		"lint:prune": "ts-prune",