feat: get package name from the dependencies property

Instead of getting the name from the `pkg` input and expecting it to be a valid npm package name, use the name from the dependencies property of the only installed package in the temporary work directory.

This allows installing local tarball packages and reading their name after installation.

See jsdocs-io/web#584

Author: velut

src/extract-package-api-effect.ts

@@ -6,7 +6,6 @@ import type { ExtractPackageApiOptions, PackageApi } from "./extract-package-api
 import { packageDeclarations } from "./package-declarations";
 import { packageJson } from "./package-json";
 import { PackageManager } from "./package-manager";
-import { packageName } from "./package-name";
 import { packageOverview } from "./package-overview";
 import { packageTypes } from "./package-types";
 import { workDir } from "./work-dir";
@@ -19,10 +18,11 @@ export const extractPackageApiEffect = ({
 }: Omit<ExtractPackageApiOptions, "bunPath">) =>
 	Effect.gen(function* () {
 		const startTime = performance.now();
-		const pkgName = yield* packageName(pkg);
 		const { path: cwd } = yield* workDir;
 		const pm = yield* PackageManager;
 		const packages = yield* pm.installPackage({ pkg, cwd });
+		const workDirPkgJson = yield* packageJson(cwd);
+		const pkgName = Object.keys(workDirPkgJson.dependencies!)[0]!;
 		const pkgDir = join(cwd, "node_modules", pkgName);
 		const pkgJson = yield* packageJson(pkgDir);
 		const types = yield* packageTypes(pkgJson, subpath);