fix: correct test fixtures for @octokit/rest and @octokit/core

[clanzhang]

Remove incorrect main and module fields from test fixtures that don't exist in the actual npm packages. Both packages are ESM-only with only type: "module" and exports fields.

Fixes #128

🔗 Linked issue

Resolves #128

🧭 Context

The test fixtures for @octokit/rest@22.0.1 and @octokit/core@7.0.5 contained main and module fields that do not exist in the real npm packages. These are pure ESM packages that declare their module type solely via type: "module" and the exports field.

📚 Description

• Remove main field from @octokit/core@7.0.5 fixture — the real package has no main
• Remove main and module fields from @octokit/rest@22.0.1 fixture — the real package has neither
• Verified that analyzePackageModuleType correctly returns 'esm' for both packages using the actual package.json data from npm
• Detection logic in analyze-esm.ts does not need changes

[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/node-modules-inspector@206

npm i https://pkg.pr.new/node-modules-tools@206

commit: 2bfa23a