feat: switch from sentences-per-line to markdownlint-sentences-per-line (#2284)

## PR Checklist

- [x] Addresses an existing open issue: fixes #2283
- [x] That issue was marked as [`status: accepting
prs`](https://github.com/JoshuaKGoldberg/create-typescript-app/issues?q=is%3Aopen+is%3Aissue+label%3A%22status%3A+accepting+prs%22)
- [x] Steps in
[CONTRIBUTING.md](https://github.com/JoshuaKGoldberg/create-typescript-app/blob/main/.github/CONTRIBUTING.md)
were taken

## Overview

Direct package rename from `sentences-to-line` to
`markdownlint-sentences-per-line`.

As noted in #2283, this is a partial step along the way to streamlining
this repo's Markdown linting.

🎁

Author: JoshuaKGoldberg

package.json

@@ -26,7 +26,7 @@
 		"format": "prettier .",
 		"lint": "eslint . --max-warnings 0",
 		"lint:knip": "knip",
-		"lint:md": "markdownlint \"**/*.md\" \".github/**/*.md\" --rules sentences-per-line",
+		"lint:md": "markdownlint \"**/*.md\" \".github/**/*.md\" --rules markdownlint-sentences-per-line",
 		"lint:packages": "pnpm dedupe --check",
 		"lint:spelling": "cspell \"**\" \".github/**/*\"",
 		"prepare": "husky",
@@ -107,12 +107,12 @@
 		"lodash": "4.17.21",
 		"markdownlint": "0.38.0",
 		"markdownlint-cli": "0.45.0",
+		"markdownlint-sentences-per-line": "0.1.1",
 		"prettier": "3.6.1",
 		"prettier-plugin-curly": "0.3.2",
 		"prettier-plugin-packagejson": "2.5.15",
 		"prettier-plugin-sh": "0.17.4",
 		"release-it": "19.0.3",
-		"sentences-per-line": "0.3.0",
 		"tsdown": "0.12.7",
 		"typescript": "5.8.3",
 		"typescript-eslint": "8.35.0",

pnpm-lock.yaml

@@ -48,10 +48,10 @@ describe("blockMarkdownlint", () => {
 			          "devDependencies": {
 			            "markdownlint": "0.38.0",
 			            "markdownlint-cli": "0.45.0",
-			            "sentences-per-line": "0.3.0",
+			            "markdownlint-sentences-per-line": "0.1.1",
 			          },
 			          "scripts": {
-			            "lint:md": "markdownlint "**/*.md" ".github/**/*.md" --rules sentences-per-line",
+			            "lint:md": "markdownlint "**/*.md" ".github/**/*.md" --rules markdownlint-sentences-per-line",
 			          },
 			        },
 			      },
@@ -129,10 +129,10 @@ describe("blockMarkdownlint", () => {
 			          "devDependencies": {
 			            "markdownlint": "0.38.0",
 			            "markdownlint-cli": "0.45.0",
-			            "sentences-per-line": "0.3.0",
+			            "markdownlint-sentences-per-line": "0.1.1",
 			          },
 			          "scripts": {
-			            "lint:md": "markdownlint "**/*.md" ".github/**/*.md" --rules sentences-per-line",
+			            "lint:md": "markdownlint "**/*.md" ".github/**/*.md" --rules markdownlint-sentences-per-line",
 			          },
 			        },
 			      },
@@ -209,10 +209,10 @@ describe("blockMarkdownlint", () => {
 			          "devDependencies": {
 			            "markdownlint": "0.38.0",
 			            "markdownlint-cli": "0.45.0",
-			            "sentences-per-line": "0.3.0",
+			            "markdownlint-sentences-per-line": "0.1.1",
 			          },
 			          "scripts": {
-			            "lint:md": "markdownlint "**/*.md" ".github/**/*.md" --rules sentences-per-line",
+			            "lint:md": "markdownlint "**/*.md" ".github/**/*.md" --rules markdownlint-sentences-per-line",
 			          },
 			        },
 			      },

src/blocks/blockMarkdownlint.test.ts

@@ -58,11 +58,11 @@ export const blockMarkdownlint = base.createBlock({
 						devDependencies: getPackageDependencies(
 							"markdownlint",
 							"markdownlint-cli",
-							"sentences-per-line",
+							"markdownlint-sentences-per-line",
 						),
 						scripts: {
 							"lint:md":
-								'markdownlint "**/*.md" ".github/**/*.md" --rules sentences-per-line',
+								'markdownlint "**/*.md" ".github/**/*.md" --rules markdownlint-sentences-per-line',
 						},
 					},
 				}),