feat: rename .prettierrc to .prettierrc.json (#1215)

## PR Checklist

- [x] Addresses an existing open issue: fixes #1214
- [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

Renames the file, removes one of its overrides, and updates templates.

.prettierrc → .prettierrc.json

@@ -1,9 +1,6 @@
 {
 	"$schema": "http://json.schemastore.org/prettierrc",
-	"overrides": [
-		{ "files": ".*rc", "options": { "parser": "json" } },
-		{ "files": ".nvmrc", "options": { "parser": "yaml" } }
-	],
+	"overrides": [{ "files": ".nvmrc", "options": { "parser": "yaml" } }],
 	"plugins": ["prettier-plugin-curly", "prettier-plugin-packagejson"],
 	"useTabs": true
 }

docs/FAQs.md

@@ -119,7 +119,7 @@ These are the projects used across many parts of `create-typescript-app`:
 
 ## Why tabs?
 
-This repository template configures `"useTabs": true` in the root-level `.prettierrc`.
+This repository template configures `"useTabs": true` in the root-level `.prettierrc.json`.
 It does so because tabs have been phrased by the community as generally better for accessibility:
 
 - <https://github.com/11ty/eleventy/issues/3098>

src/steps/writing/creation/rootFiles.ts

@@ -43,13 +43,9 @@ export async function createRootFiles(options: Options) {
 			"lib/",
 			"pnpm-lock.yaml",
 		]),
-		".prettierrc": await formatJson({
+		".prettierrc.json": await formatJson({
 			$schema: "http://json.schemastore.org/prettierrc",
 			overrides: [
-				{
-					files: ".*rc",
-					options: { parser: "json" },
-				},
 				{
 					files: ".nvmrc",
 					options: { parser: "yaml" },