Uw2 pixi

[julesghub]

PIXI!
Adding a pixi based workflow for building and setting up the uw2 environment.
Feedback welcome @lmoresi

[Copilot]

Pull Request Overview

Adds a Pixi-based workflow for building and testing the UW2 environment.

• Introduces pixi.toml to declare workspace settings, tasks, and dependencies.
• Updates .gitattributes to control merging and syntax highlighting for the lock file.

Reviewed Changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated no comments.

File	Description
pixi.toml	Defines workspace metadata, build/test tasks, platforms, and deps
.gitattributes	Configures merge strategy and Linguist settings for pixi.lock

Comments suppressed due to low confidence (2)

.gitattributes:7

• The lock file uses TOML syntax, so setting linguist-language=Toml would enable correct highlighting instead of YAML.

pixi.lock merge=binary linguist-language=YAML linguist-generated=true

pixi.toml:8

• [nitpick] If Windows support is intended, consider adding "win-64" to the platforms list to prevent surprises for Windows users.

platforms = ["linux-64", "osx-arm64"]