[Dev] Up compat: release 1.0 OptimalControl

[ocots]

Update to use the version v1.0.0 of OptimalControl. Use Minpack instead of NonlinearSolve.

[ocots]

Write this at the end of Index.md:

https://github.com/control-toolbox/OptimalControlProblems.jl/blob/d49a4be99bac4f4b311f405d71eefeb7a14f99fe/docs/src/index.md?plain=1#L23-L85