Merge branch 'barry/2026-01-13/ftn-generation-for-context-functions' into 'main'

Fortran generation of interface definitions for functions that take and return context variables (void *ctx and PetC

Merge branch 'barry/2026-01-13/ftn-generation-for-context-functions' into 'main'

Fortran generation of interface definitions for functions that take and return context variables (void *ctx and PetCtx ctx)

See merge request petsc/petsc!8956

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Add automatic generated fortran support for setting and returning contexts

Major cleanup of the code for setting and returning application (previously called user) contexts
- PetscCtx ctx is now t

Add automatic generated fortran support for setting and returning contexts

Major cleanup of the code for setting and returning application (previously called user) contexts
- PetscCtx ctx is now the standard for passing in contexts
- PetscCtxRt ctx is the standard for passing out contexts, including context destroy routines based on PetscCtxDestroyFn

Both of these are typedef to void*

Also removed most use of user and userctx for context arguments now consistently named ctx

Improved documentation on PetscCtx and PetscCtxRt and on how to use contexts (including getting them) from Fortran

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Merge branch 'knepley/feature-swarm-remap' into 'main'

Swarm: Adding remapping

See merge request petsc/petsc!8059

Hamiltonian ex2: Massive cleanup
- Moved remapping to DMSwarm
- Removed fake 1D mode
- Now get velocity DM from the Swarm cell DM
- Removed initCoordinates and initVelocity fields
- Optimized tabulat

Hamiltonian ex2: Massive cleanup
- Moved remapping to DMSwarm
- Removed fake 1D mode
- Now get velocity DM from the Swarm cell DM
- Removed initCoordinates and initVelocity fields
- Optimized tabulation creation in electric field evaluation
- Removed ComputeError()
- Removed remap flag
- Changed all 2D runs to 1D runs

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Merge branch 'jpusztay/example-twostream-update' into 'main'

Update Hamiltonian Electrostatic Example with Landau Damping

See merge request petsc/petsc!7418

TS ex2: Replace swarm ex9 with hamiltonian ex2

- Parallelize initialization and primal implementation
- Add test based output, mpiu vs callmpi, fix global particle number
- Fix parallelization for m

TS ex2: Replace swarm ex9 with hamiltonian ex2

- Parallelize initialization and primal implementation
- Add test based output, mpiu vs callmpi, fix global particle number
- Fix parallelization for mixed form, require superlu_dist for test case

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