Fix the function naming consistency issue: dynamic vs dynamics

[shengjiex98]

Problem description

I've noticed the naming of the dynamics functions are inconsistent from file to file. For example, dynamic() in base_agent.py,

Verse-library/verse/agents/base_agent.py

Lines 63 to 65 in 07dcc24

	@staticmethod
	def dynamic(t, state, u):
	raise NotImplementedError()

vs dynamics() in example_agent/ball_agent.py:

Verse-library/verse/agents/example_agent/ball_agent.py

Lines 26 to 33 in 07dcc24

	def dynamics(self, t, state):
	"""Defines the RHS of the ODE used to simulate trajectories"""
	x, y, vx, vy = state
	x_dot = vx
	y_dot = vy
	vx_dot = 0
	vy_dot = 0
	return [x_dot, y_dot, vx_dot, vy_dot]

This also applies to a number of multi-dynamics agents:

Verse-library/demo/dryvr_demo/lin_thermo.py

Lines 33 to 43 in 07dcc24

	@staticmethod
	def dynamic_heat(t, state):
	x = state
	x_dot = 40-0.5*x
	return [x_dot]
	@staticmethod
	def dynamic_cool(t, state):
	x = state
	x_dot = 30-0.5*x
	return [x_dot]

Changes and tests

Since "dynamics" seem to be the more appropriate term, I've changed all references of dynamic that I could find to dynamics, including multi-dyanmics agents (i.e., dynamic_heat -> dynamics_heat. I rantests/test_verse.py and it passed without issues.

Happy to discuss further in case I missed anything :)