chore: switch 'Getting Started' to 'Usage' (#1877)

## PR Checklist

- [x] Addresses an existing open issue: fixes #1872
- [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

💖

README.md

@@ -23,7 +23,7 @@
 `create-typescript-app` is a one-stop-shop solution to set up a new or existing repository with the latest and greatest TypeScript tooling.
 It includes options not just for building and testing but also GitHub repository templates, contributor recognition, automated release management, and more.
 
-## Getting Started
+## Usage
 
 First make sure you have the following installed:
 

src/steps/updateLocalFiles.test.ts

@@ -150,7 +150,7 @@ describe("updateLocalFiles", () => {
 			    {
 			      "allowEmptyPaths": true,
 			      "files": "./README.md",
-			      "from": /## Getting Started\\.\\*## Development/gs,
+			      "from": /## Usage\\.\\*## Development/gs,
 			      "to": "## Development",
 			    },
 			  ],
@@ -317,7 +317,7 @@ describe("updateLocalFiles", () => {
 			    {
 			      "allowEmptyPaths": true,
 			      "files": "./README.md",
-			      "from": /## Getting Started\\.\\*## Development/gs,
+			      "from": /## Usage\\.\\*## Development/gs,
 			      "to": "## Development",
 			    },
 			  ],

src/steps/updateLocalFiles.ts

@@ -30,11 +30,7 @@ export async function updateLocalFiles(options: Options) {
 					[/"test:initialize": ".*/g, ``, "./package.json"],
 					[/"initialize": ".*/g, ``, "./package.json"],
 					[/"test:migrate": ".+\n/g, ``, "./package.json"],
-					[
-						/## Getting Started.*## Development/gs,
-						`## Development`,
-						"./README.md",
-					],
+					[/## Usage.*## Development/gs, `## Development`, "./README.md"],
 					[/\n## Setup Scripts.*$/gs, "", "./.github/DEVELOPMENT.md"],
 					[`\t\t"src/initialize/index.ts",\n`, ``, "./knip.json"],
 					[`\t\t"src/migrate/index.ts",\n`, ``, "./knip.json"],

src/steps/writeReadme/findIntroSectionClose.test.ts

@@ -55,7 +55,7 @@ Next line.
 
 First intro text.
 
-## Getting Started
+## Usage
 `,
 			173,
 		],