[ON-HOLD] Connect simulation with PDDL output

[Syed-Abbas-Hussain]

Description:
Make the simulation executable from PDDL output so that generated plans can be applied to the agents in simulation.

Tasks:

• Define interface to parse PDDL output plans (actions, sequence, timing).
• Map PDDL actions to simulation commands for GEN0, Pix, and Go1 agents.
• Implement ROS2 nodes or scripts to execute the plan in simulation.
• Validate execution with simple example plans.