docs(api): update RST API reference pages for consistency

docs/api/fitting.rst

@@ -2,10 +2,10 @@
 Fitting
 =======
 
-Fitting
--------
+Imaging and Interferometer
+--------------------------
 
-For fitting a model consisting of one or more galaxies to a dataset.
+For fitting a model consisting of one or more galaxies to an imaging or interferometer dataset.
 
 .. currentmodule:: autogalaxy
 
@@ -15,4 +15,30 @@ For fitting a model consisting of one or more galaxies to a dataset.
    :recursive:
 
    FitImaging
-   FitInterferometer
+   FitInterferometer
+
+Ellipse
+-------
+
+For fitting ellipses (isophotes) to an imaging dataset to characterise galaxy morphology.
+
+.. autosummary::
+   :toctree: _autosummary
+   :template: custom-class-template.rst
+   :recursive:
+
+   FitEllipse
+
+Quantity
+--------
+
+For fitting a derived quantity (e.g. convergence, deflection angles) computed by one mass
+or light profile to the same quantity computed by another, enabling model comparison between
+different profile families.
+
+.. autosummary::
+   :toctree: _autosummary
+   :template: custom-class-template.rst
+   :recursive:
+
+   FitQuantity

docs/api/light.rst

@@ -5,6 +5,8 @@ Light Profiles
 Standard [``ag.lp``]
 --------------------
 
+Standard parametric light profiles whose ``intensity`` is a free parameter of the model.
+
 .. currentmodule:: autogalaxy.profiles.light.standard
 
 .. autosummary::
@@ -27,4 +29,67 @@ Standard [``ag.lp``]
    Chameleon
    ChameleonSph
    ElsonFreeFall
-   ElsonFreeFallSph
+   ElsonFreeFallSph
+
+Linear [``ag.lp_linear``]
+--------------------------
+
+Linear light profiles whose ``intensity`` is not a free parameter but is instead solved
+analytically via a linear matrix inversion during each likelihood evaluation.  This allows
+many profiles to be combined efficiently without exploding the non-linear parameter space.
+
+.. currentmodule:: autogalaxy.profiles.light.linear
+
+.. autosummary::
+   :toctree: _autosummary
+   :template: custom-class-template.rst
+   :recursive:
+
+   Gaussian
+   GaussianSph
+   Sersic
+   SersicSph
+   Exponential
+   ExponentialSph
+   DevVaucouleurs
+   DevVaucouleursSph
+   SersicCore
+   SersicCoreSph
+   ExponentialCore
+   ExponentialCoreSph
+
+Operated [``ag.lp_operated``]
+------------------------------
+
+Operated light profiles that represent emission which has already had an instrument
+operation (e.g. PSF convolution) applied to it.  The ``operated_only`` parameter on
+fitting classes controls whether these profiles are included or excluded from a given
+image computation.
+
+.. currentmodule:: autogalaxy.profiles.light.operated
+
+.. autosummary::
+   :toctree: _autosummary
+   :template: custom-class-template.rst
+   :recursive:
+
+   Gaussian
+   Moffat
+   Sersic
+
+Basis [``ag.lp_basis``]
+------------------------
+
+A ``Basis`` groups a collection of light profiles (e.g. a Multi-Gaussian Expansion or
+shapelet decomposition) so that they behave as a single profile in the model.  When the
+constituent profiles are ``LightProfileLinear`` instances their intensities are all solved
+simultaneously via a single inversion.
+
+.. currentmodule:: autogalaxy.profiles.basis
+
+.. autosummary::
+   :toctree: _autosummary
+   :template: custom-class-template.rst
+   :recursive:
+
+   Basis

docs/api/modeling.rst

@@ -18,6 +18,8 @@ It acts as an interface between the data, model and the non-linear search.
 
    AnalysisImaging
    AnalysisInterferometer
+   AnalysisEllipse
+   AnalysisQuantity
 
 Non-linear Searches
 -------------------