Preserve order when parsing markdown

[peterpeterparker]

Given for example the generated documentation of https://github.com/dfinity/ic-js/tree/main/packages/ledger-icp

The configuration of generateDocumentation is provided as following:

const ledgerICPInputFiles = [
  "./packages/ledger-icp/src/ledger.canister.ts",
  "./packages/ledger-icp/src/index.canister.ts",
  "./packages/ledger-icp/src/account_identifier.ts",
];

But the markdown file contains first the latest.