New installation instructions for windows binaries using pixi

[knmcguire]

🎉 New feature

Closes #702

Summary

New binary installation instructions using Pixi for Jetty.

This works on the other simulations as well but we will need to update the version numbers, but I first just want to see if you like this addition before I add the others as well

# For Ionic
[dependencies]
gz-sim = "9.*"

# For Harmonic
[dependencies]
gz-sim = "8.*"

Fortress would work as well... but I would leave that out because that is using specific ignition commands.

Backport Policy

• This is safe to backport to the following versions:
  • Jetty
  • Ionic
  • Harmonic
  • [] Fortress
• This should not be backported
• I am not sure
• Other (fill in yourself)

Test it

Checklist

• Signed all commits for DCO
• Added a screen capture or video to the PR description that demonstrates the feature
• Added tests
• Added example and/or tutorial
• Updated documentation (as needed)
• Updated migration guide (as needed)
• Consider updating Python bindings (if the library has them)
• codecheck passed (See contributing)
• All tests passed (See test coverage)
• Updated Bazel files (if adding new files). Created an issue otherwise.
• While waiting for a review on your PR, please help review another open pull request to support the maintainers
• Was GenAI used to generate this PR? If so, make sure to add "Assisted-by" to your commits. (See this policy for more info.)

I didn't use any AI for this (so might have to check spelling)

Note to maintainers: Remember to use Squash-Merge and edit the commit message to match the pull request summary while retaining Signed-off-by and Generated-by messages.

Backports: If this is a backport, please use Rebase and Merge instead.
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🎈 Release

Preparation for <X.Y.Z> release.

Comparison to <x.y.z>: https://github.com/gazebosim//compare/<LATEST_TAG_BRANCH>...<RELEASE_BRANCH>

Needed by <PR(s)>

Checklist

• Asked team if this is a good time for a release
• There are no changes to be ported from the previous major version
• No PRs targeted at this major version are close to getting in
• Bumped minor for new features, patch for bug fixes
• Updated changelog
• Updated migration guide (as needed)
• Link to PR updating dependency versions in appropriate repository in gazebo-release (as needed):

Note to maintainers: Remember to use Squash-Merge and edit the commit message to match the pull request summary while retaining Signed-off-by messages.

[azeey]

Thanks so much @knmcguire! Just a couple minor suggestions

[azeey]

Thanks @knmcguire. Mind updating the other versions as well?

[knmcguire]

Will do!

Is it okay if I perhaps skip fortress ? I haven't gotten that to work with pixi

[azeey]

Yes, let's skip Fortress

[knmcguire]

See #711