* pixi installation optiont
* chore: Update .gitignore to include /third_party and include pixi lock file
* feat: Update download and training commands for dozer data
The commit updates the download and training commands for the dozer data in the `pixi.toml` file. It renames the `download-sample-data` command to `download-dozer-data` and modifies the `train-example-splat` and `train-example-nerf` commands to include the dozer data as a dependency.
This makes it easy to run an example training for both nerfacto and splatfacto
* update to include range between 3.8 -3.10
* Add Pixi installation instructions to the installation.md file
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Co-authored-by: maturk <30566358+maturk@users.noreply.github.com>