[BUG] Spurious changes in `./bin/generate-samples.sh` output on Windows

Bug Report Checklist

• [ X ] Have you provided a full/minimal spec to reproduce the issue?
• [ N/A ] Have you validated the input using an OpenAPI validator (example)?
• [ X ] Have you tested with the latest master to confirm the issue still exists?
• [ X ] Have you searched for related issues/PRs?
• [ X ] What's the actual output vs expected output?
• [Optional] Sponsorship to speed up the bug fix or feature request (example)

Description

running the steps required as part of the PR template generates a bunch of junk on Windows, including:

• filepath / vs \
• alphabetically ordered files - / before vs after letters
• /r/n vs /n

openapi-generator version

master branch

Generation Details

running the steps required as part of the PR template

Steps to reproduce

1. Open git-bash on Windows
2. git checkout master && git reset --hard && git clean -fdx to make sure you don't have any junk in your local repo
3. ./mvnw clean package
4. ./bin/generate-samples.sh to generate the samples
5. git diff to see the unwanted changes.

Expected output: nothing in the diff
Actual output: very long, containing a lot of spurious changes. See attached
tmp.txt

Start with bin/generate-samples.sh and the Windows Git Bash reproduction steps, including ./mvnw clean package. Compare the generated samples with git diff and inspect the reported path separator, file ordering, and line-ending changes. Done means the documented generation steps produce no diff on Windows.