refactor(docs): update neuron imports to use brainpy.version2.dynold and improve module structure

Author: oujago

brainpy/version2/neurons.py

@@ -17,3 +17,72 @@
 This module has been deprecated since brainpy>=2.4.0. Use ``brainpy.version2.dyn`` module instead.
 """
 
+
+from brainpy.version2.dynold.neurons.biological_models import (
+  HH as HH,
+  MorrisLecar as MorrisLecar,
+  PinskyRinzelModel as PinskyRinzelModel,
+  WangBuzsakiModel as WangBuzsakiModel,
+)
+
+from brainpy.version2.dynold.neurons.fractional_models import (
+  FractionalNeuron as FractionalNeuron,
+  FractionalFHR as FractionalFHR,
+  FractionalIzhikevich as FractionalIzhikevich,
+)
+
+from brainpy.version2.dynold.neurons.reduced_models import (
+  LeakyIntegrator as LeakyIntegrator,
+  LIF as LIF,
+  ExpIF as ExpIF,
+  AdExIF as AdExIF,
+  QuaIF as QuaIF,
+  AdQuaIF as AdQuaIF,
+  GIF as GIF,
+  ALIFBellec2020 as ALIFBellec2020,
+  Izhikevich as Izhikevich,
+  HindmarshRose as HindmarshRose,
+  FHN as FHN,
+  LIF_SFA_Bellec2020,
+)
+from brainpy.version2.dyn.others import (
+  InputGroup as InputGroup,
+  OutputGroup as OutputGroup,
+  SpikeTimeGroup as SpikeTimeGroup,
+  PoissonGroup as PoissonGroup,
+  Leaky as Leaky,
+  Integrator as Integrator,
+  OUProcess as OUProcess, 
+)
+
+if __name__ == '__main__':
+    HH
+    MorrisLecar
+    PinskyRinzelModel
+    WangBuzsakiModel
+
+    FractionalNeuron
+    FractionalFHR
+    FractionalIzhikevich
+
+    LeakyIntegrator
+    LIF
+    ExpIF
+    AdExIF
+    QuaIF
+    AdQuaIF
+    GIF
+    ALIFBellec2020
+    Izhikevich
+    HindmarshRose
+    FHN
+    LIF_SFA_Bellec2020
+
+    InputGroup
+    OutputGroup
+    SpikeTimeGroup
+    PoissonGroup
+    Leaky
+    Integrator
+    OUProcess
+