DAE Examples and Last Point Strategy

[pilarcoordinates]

This PR introduces two new examples for handling DAEs with state-dependent switches and implements a "Last Point Strategy" to optimize the integration process immediately preceding a switching point.

1. New Examples for State-Dependent Switches
   To demonstrate and test the handling of DAEs with switches, I have added:

• Academic Example: Fundamental example to demonstrate working with DAEs in IFDIFF. (files: daeExampleRHS.m, daeExample_main.m, daeExample_README.md)
• RLC Circuit with Switch: Physical modeling example about an RLC electrical circuit with a voltage-controlled switch. (files: rlcRHS.m, rlc_main.m, rlcExample_README.md)

2. Last Point Strategy (files: extendODEuntilSwitch_t1_to_t2.m and Config)
   Once a switching point is detected (between t1​ and t2​), the strategy forces the integrator to reach the exact switching point using a single step. For compatible one-step solvers the function sets the InitialStep to the remaining time-to-switch (delta_t) and relaxes the tolerances for this section. This ensures the solver hits the boundary efficiently without sub-stepping.

• Supported Solvers: ode23, ode45, ode78, ode89, ode113, ode23t, ode23tb
• Activation of the strategy: Enable last_point_strategy in Config file