Documentation for v0.1 version (#199)

* Adding Equations, solving typos
* improve _code.rst
* the team rst and restuctore index.rst
* fixing errors

---------

Co-authored-by: Dario Coscia <dariocoscia@dhcp-015.eduroam.sissa.it>

docs/source/_rst/layers/convolution.rst

@@ -1,12 +1,8 @@
-ContinuousConvBlock
-===================
+Continuous convolution
+=========================
 .. currentmodule:: pina.model.layers.convolution_2d
 
-.. automodule:: pina.model.layers.convolution_2d
-
 .. autoclass:: ContinuousConvBlock
     :members:
-    :private-members:
-    :undoc-members:
     :show-inheritance:
     :noindex:

docs/source/_rst/layers/enhanced_linear.rst

@@ -0,0 +1,8 @@
+EnhancedLinear
+=================
+.. currentmodule:: pina.model.layers.residual
+
+.. autoclass:: EnhancedLinear
+   :members:
+   :show-inheritance:
+   :noindex:

docs/source/_rst/layers/fourier.rst

@@ -0,0 +1,16 @@
+Fourier Layers
+===================
+.. currentmodule:: pina.model.layers.fourier
+
+
+.. autoclass:: FourierBlock1D
+    :members:
+    :show-inheritance:
+
+.. autoclass:: FourierBlock2D
+    :members:
+    :show-inheritance:
+
+.. autoclass:: FourierBlock3D
+    :members:
+    :show-inheritance:

docs/source/_rst/layers/residual.rst

@@ -0,0 +1,7 @@
+Residual layer
+===================
+.. currentmodule:: pina.model.layers.residual
+
+.. autoclass:: ResidualBlock
+    :members:
+    :show-inheritance:

docs/source/_rst/layers/spectral.rst

@@ -0,0 +1,15 @@
+Spectral Convolution
+======================
+.. currentmodule:: pina.model.layers.spectral
+    
+.. autoclass:: SpectralConvBlock1D
+    :members:
+    :show-inheritance:
+
+.. autoclass:: SpectralConvBlock2D
+    :members:
+    :show-inheritance:
+
+.. autoclass:: SpectralConvBlock3D
+    :members:
+    :show-inheritance: