docs: generic quantities documentation added

docs/reference/systems.rst

@@ -1,6 +1,11 @@
 Systems
 =======
 
+.. toctree::
+    :maxdepth: 2
+
+    systems/generic
+
 .. toctree::
     :maxdepth: 2
 

docs/reference/systems/generic.rst

@@ -0,0 +1,9 @@
+Generic
+=======
+
+.. toctree::
+    :maxdepth: 2
+
+    generic/unknown
+    generic/dimensionless
+    generic/angle

docs/reference/systems/generic/angle.rst

@@ -0,0 +1,8 @@
+Angle
+=====
+
+.. doxygenstruct:: units::radian
+
+.. doxygenstruct:: units::dim_angle
+
+.. doxygentypedef:: units::angle

docs/reference/systems/generic/dimensionless.rst

@@ -0,0 +1,10 @@
+Dimensionless
+=============
+
+.. doxygenstruct:: units::one
+
+.. doxygenstruct:: units::percent
+
+.. doxygenstruct:: units::dim_one
+
+.. doxygentypedef:: units::dimensionless

docs/reference/systems/generic/unknown.rst

@@ -0,0 +1,6 @@
+Unknown
+=======
+
+.. doxygenstruct:: units::unknown_coherent_unit
+
+.. doxygenstruct:: units::unknown_dimension