chore: move codecov and logo files to directories (#1213)

## PR Checklist

- [x] Addresses an existing open issue: fixes #1209; fixes #1210
- [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

Moves the files as described in the issues. Also updates
`clearUnnecessaryFiles` to refer to both codecov paths.

Author: JoshuaKGoldberg

codecov.yml renamed to .github/codecov.yml

@@ -15,7 +15,7 @@
 	<img alt="💪 TypeScript: Strict" src="https://img.shields.io/badge/%F0%9F%92%AA_typescript-strict-21bb42.svg" />
 </p>
 
-<img align="right" alt="Project logo: the TypeScript blue square with rounded corners, but a plus sign instead of 'TS'" src="./create-typescript-app.png">
+<img align="right" alt="Project logo: the TypeScript blue square with rounded corners, but a plus sign instead of 'TS'" src="./docs/create-typescript-app.png">
 
 `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.

README.md

@@ -96,7 +96,7 @@ exports[`expected file changes > README.md 1`] = `
 +++ b/README.md
 @@ ... @@
  
- <img align="right" alt="Project logo: the TypeScript blue square with rounded corners, but a plus sign instead of 'TS'" src="./create-typescript-app.png">
+ <img align="right" alt="Project logo: the TypeScript blue square with rounded corners, but a plus sign instead of 'TS'" src="./docs/create-typescript-app.png">
  
 -\`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.

create-typescript-app.png renamed to docs/create-typescript-app.png

@@ -32,7 +32,7 @@ const bin = "./bin/index.js";
 const guide =
 	"https://www.joshuakgoldberg.com/blog/contributing-to-a-create-typescript-app-repository";
 const guideTitle = "Contributing to a create-typescript-app Repository";
-const logo = "./create-typescript-app.png";
+const logo = "./docs/create-typescript-app.png";
 const logoAlt = `Project logo: the TypeScript blue square with rounded corners, but a plus sign instead of 'TS'`;
 const owner = "JoshuaKGoldberg";
 const title = "Create TypeScript App";

script/__snapshots__/migrate-test-e2e.js.snap

@@ -9,6 +9,7 @@ const globPaths = [
 	...extensions("jest.config", "cjs", "js", "json", "mjs", "ts"),
 	"./src/**/*.js",
 	".circleci/config.yml",
+	".github/codecov.yml",
 	".babelrc",
 	".npmignore",
 	".eslintrc",