fix: skip check for name to match npm package when private is true (#455

)

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## PR Checklist

-   [x] Addresses an existing open issue: fixes #000
- [x] That issue was marked as [`status: accepting
prs`](https://github.com/JoshuaKGoldberg/eslint-plugin-package-json/issues?q=is%3Aopen+is%3Aissue+label%3A%22status%3A+accepting+prs%22)
- [x] Steps in
[CONTRIBUTING.md](https://github.com/JoshuaKGoldberg/eslint-plugin-package-json/blob/main/.github/CONTRIBUTING.md)
were taken

## Overview

<!-- Description of what is changed and how the code change does that.
-->

When I write a project that is not a npm package, we do not need to make
the name field match the npm package rules.

Sorry for not creating an issue first(I am lazy), feel free to close
this PR if you do not want to make this change.

src/rules/valid-name.ts

@@ -22,6 +22,20 @@ export const rule = createRule({
 					return;
 				}
 
+				const privateField = node.parent.properties.find(
+					(p) =>
+						p.key.type === "JSONLiteral" &&
+						p.key.value === "private",
+				);
+				if (
+					privateField &&
+					privateField.value.type === "JSONLiteral" &&
+					(privateField.value.value === true ||
+						privateField.value.value === "true")
+				) {
+					return;
+				}
+
 				const { errors, warnings } = validate(node.value.value);
 				const complaints = [...(errors ?? []), ...(warnings ?? [])];
 				if (!complaints.length) {

src/tests/rules/valid-name.test.ts

@@ -87,10 +87,28 @@ ruleTester.run("valid-name", rule, {
 				},
 			],
 		},
+		{
+			code: `{
+	"name": "InvalidPackageNameWithPrivateFalse",
+	"private": false
+}
+`,
+			errors: [
+				{
+					data: {
+						complaints:
+							"name can no longer contain capital letters",
+					},
+					messageId: "invalid",
+				},
+			],
+		},
 	],
 	valid: [
 		"{}",
 		`{ "name": "valid-package-name" }`,
 		`{ "name": "@scoped/valid-package-name" }`,
+		`{ "name": "InvalidPackageNameWithPrivateTrue", "private": true }`,
+		`{ "name": "InvalidPackageNameWithPrivateTrue", "private": "true" }`,
 	],
 });