Update files with ode_solver (#95)

* Update ode_utils.py

merge ode_solver into ide_utils

* Delete ngclearn/utils/diffeq/ode_solver.py

* Update ode_utils.py

refactor doc-string

* Update odes.py

* Update sindy.md

ode_solver to ode_utils

Author: Faezehabibi

docs/museum/sindy.md

@@ -280,7 +280,7 @@ Solving LSQ with the sparse matrix $\mathbf{\Theta_s}$ and $\mathbf{W_s}$ and fi
 import numpy as np
 import jax.numpy as jnp
 from ngclearn.utils.feature_dictionaries.polynomialLibrary import PolynomialLibrary
-from ngclearn.utils.diffeq.ode_solver import solve_ode
+from ngclearn.utils.diffeq.ode_utils import solve_ode
 from ngclearn.utils.diffeq.odes import lorenz, linear_2D
 
 jnp.set_printoptions(suppress=True, precision=5)

ngclearn/utils/diffeq/odes.py

@@ -171,7 +171,7 @@ def oscillator(t, x, params, mu1=0.05, mu2=-0.01, omega=3.0, alpha=-2.0, beta=-5
 
 if __name__ == "__main__":
     import matplotlib.pyplot as plt
-    from ngclearn.utils.diffeq.ode_solver import solve_ode
+    from ngclearn.utils.diffeq.ode_utils import solve_ode
 
 
     t0 = 0.