Merge branch 'MarDiehl/improve-Fortran-examples' into 'main'

Improve Fortran examples

See merge request petsc/petsc!8698

cleanup suggestions by @BarrySmith

also noticed a few stray functions not marked as external and put them
into modules

place all the include statements at the top

Repeated inclusion in multiple location, e.g. at the start of a
module or function is not needed. This becomes clear if all includes are
outside of the ac

place all the include statements at the top

Repeated inclusion in multiple location, e.g. at the start of a
module or function is not needed. This becomes clear if all includes are
outside of the actual Fortran code.
Added regex to check that with the help of @sbalay

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Merge branch 'barry/2025-07-01/format-fortran-source-fprettify' into 'main'

format fortran source with fprettify

See merge request petsc/petsc!8514

Run fprettify

Merge branch 'tapashree/petscviewerHDFWrite' into 'main'

Fortran: Fix HDF5 attribute writing interface

Closes #194

See merge request petsc/petsc!8437

Fortran: Fix HDF5 attribute writing interface

- Ensure real attribute writing routine is available unconditionally in real-only builds
- Add new wrappers in zhdf5f.c for writing:
- Integer attribu

Fortran: Fix HDF5 attribute writing interface

- Ensure real attribute writing routine is available unconditionally in real-only builds
- Add new wrappers in zhdf5f.c for writing:
- Integer attributes
- Scalar (PetscScalar) attributes
- Real attributes
- Update petscviewer.h90 to expose the real version consistently
- Adds a minimal test program (ex80f.F90) to verify functionality
- Update test case to reflect proper names
Fixes: #194

Thanks-to: Martin Diehl

add dependency for HDF5 in test

fix the c stubs to remove garbage values

update the test case to reflect proper names

fix clang format

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