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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Fix bad decisions made in writing TS.

Fix -ts_dt to -ts_time_step and add initial time step to TSView output

commit a5a92c11fa9681148df375b257eda4e09909b74e
Author: Barry Smith <bsmith@petsc.de

Fix bad decisions made in writing TS.

Fix -ts_dt to -ts_time_step and add initial time step to TSView output

commit a5a92c11fa9681148df375b257eda4e09909b74e
Author: Barry Smith <bsmith@petsc.dev>
Date: Mon Dec 1 14:51:27 2025 -0500

add max_snes_failures to TSView

commit 32d3e79f6fa743930b1bbf32d03b9181b5b5418a
Author: Barry Smith <bsmith@petsc.dev>
Fix wrongly named options and add to TSView

Wrong name for options database key -ts_max_reject should be -ts_max_step_rejections!

Add max_reject value to TSView

Add max_snes_failures to TSView

Add initial timestep to TSView

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checkbadSource: enforce proper style in makefiles

Change use of void (*)(void) and void (**)(void) in the PETSc API to PetscVoidFn * and PetscVoidFn ** or PetscErrorCodeFn * or PetscErrorCodeFn **