feat: support org scoped npmrc (#26)

<!-- 👋 Hi, thanks for sending a PR to azdo-npm-auth! 💖.
Please fill out all fields below and make sure each item is true and [x]
checked.
Otherwise we may not be able to review your PR. -->

## PR Checklist

- [x] Addresses an existing open issue: fixes #25
- [x] That issue was marked as [`status: accepting
prs`](https://github.com/johnnyreilly/azdo-npm-auth/issues?q=is%3Aopen+is%3Aissue+label%3A%22status%3A+accepting+prs%22)
- [x] Steps in
[CONTRIBUTING.md](https://github.com/johnnyreilly/azdo-npm-auth/blob/main/.github/CONTRIBUTING.md)
were taken

## Overview

<!-- Description of what is changed and how the code change does that.
-->
This PR adds support for org scoped registry entries as described in #25

src/projectNpmrcParse.test.ts

@@ -14,6 +14,22 @@ describe("projectNpmrcParse", () => {
 	it("outputs the expected structure on successful parse", async () => {
 		mockReadFile.mockResolvedValue(`registry=https://pkgs.dev.azure.com/johnnyreilly/_packaging/npmrc-script-organization/npm/registry/ 
                         
+always-auth=true`);
+		const result = await projectNpmrcParse({
+			npmrcPath: "/home/john/code/github/azdo-npm-auth/.npmrc",
+		});
+		expect(result).toEqual({
+			organization: "johnnyreilly",
+			urlWithoutRegistryAtEnd:
+				"//pkgs.dev.azure.com/johnnyreilly/_packaging/npmrc-script-organization/npm/",
+			urlWithoutRegistryAtStart:
+				"//pkgs.dev.azure.com/johnnyreilly/_packaging/npmrc-script-organization/npm/registry/",
+		});
+	});
+
+	it("outputs the expected structure on successful parse with org scope", async () => {
+		mockReadFile.mockResolvedValue(`@myorg:registry=https://pkgs.dev.azure.com/johnnyreilly/_packaging/npmrc-script-organization/npm/registry/ 
+                        
 always-auth=true`);
 		const result = await projectNpmrcParse({
 			npmrcPath: "/home/john/code/github/azdo-npm-auth/.npmrc",

src/projectNpmrcParse.ts

@@ -22,14 +22,14 @@ export async function projectNpmrcParse({
 		throw new Error(`No .npmrc found at: ${npmrcPath}`);
 	}
 
-	const regex = /^registry=.*$/gm;
-	const match = npmrcContents.match(regex);
+	const regex = /^(?:@[\w-]+:)?registry=(.*)$/m;
+	const match = regex.exec(npmrcContents);
 
 	if (!match || match.length === 0) {
 		throw new Error(`Unable to extract information from project .npmrc`);
 	}
 
-	const registry = match[0].replace("registry=", "").trim();
+	const registry = match[1].trim();
 
 	return makeFromRegistry({ registry, logger });
 }