New package: Macchiato v0.2.0

[JuliaRegistrator]

• Registering package: Macchiato
• Repository: https://github.com/JuliaMeshless/Macchiato.jl
• Created by: @kylebeggs
• Version: v0.2.0
• Commit: 86db8381299b0ebfbbb61241baf4cd348ca23024
• Reviewed by: @kylebeggs
• Reference: JuliaMeshless/Macchiato.jl@86db838#commitcomment-178489324
• Release notes:

## Breaking changes

No breaking changes.

## Features

- Add Oceananigans-style `Simulation` API for running simulations
- Add linear elasticity model with boundary conditions and traction operators
- Add `zero_rows!` utility for O(nnz) sparse row zeroing
- Add Ferrite FEM cantilever beam example for comparison

## Performance

- Share KNN adjacency lists across operators and remove redundant weight updates

## Bug Fixes

- Fix mixed partial operator and body force sign in elasticity
- Handle `SparseVector` returned by RadialBasisFunctions for single evaluation points
- Fix variable naming and `Displacement` constructor in mechanics
- Correct Timoshenko analytical solution in beam example
- Thread RBF basis kwargs through to traction BC operators

## Refactoring

- Unify Dirichlet boundary conditions and simplify BC system with traits
- Remove legacy EquationSet BC compatibility system
- Move test dependencies to separate `test/Project.toml`

## Documentation

- Complete documentation overhaul with source-verified corrections
- Add Custom PDEs guide
- Update PhysicsDomain to EquationSet naming throughout

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[goerz]

How does this relate to #149606? A v0.x seems much more appropriate to the apparent status of the project. In fact, it seems well on its way towards a v1.0 release

[kylebeggs]

@goerz we can close the previous in favor of this one. How do I reconcile the version in the Project.toml now?

[goerz]

I'd say, decide on which version you want to start with, which probably should be either v0.1, v1.0, or maybe v0.2 if you want to clarify what happened to v0.1 / retro-actively at a v0.1 tag to your repo. Set that version in your Project.toml, and then resubmit the registration. If you're going with v0.2, that'll simply update this PR to the latest commit (and I'll then unblock it to auto-merge in 3 days). If you decide on v0.1 or v1.0, it will create a new PR, and then I'll close both this PR and #149606 in favor of the new one.

[noblock]

[kylebeggs]

Please close both PRs - I will create a new PR with 0.1. Thank you!

[kylebeggs]

see #149638

[goerz]

Closing in favor of #149638