Add model documentation

This is a bit of a compromise, I don't think there is a huge benefit in
replicating the whole description from PedestrianDynamics.org

Closes #1342

docs/source/index.rst

@@ -8,6 +8,7 @@ JuPedSim
 
    Getting started <notebooks/getting_started>
    Concepts <concepts/index>
+   Pedestrian Models <pedestrian_models/index>
    Notebooks <notebooks/index>
    History <history>
    Disclaimer <disclaimer>

docs/source/pedestrian_models/index.rst

@@ -0,0 +1,94 @@
+=================
+Pedestrian Models
+=================
+
+JuPedSim allows creating pedestrian simulations with different microscopic
+models. Below is a list of all the models that are currently available. Please
+refer to the links in the respective section for a detailed discussion of the
+respective model.
+
+**************************
+Collision Free Speed Model
+**************************
+
+The collision-free speed model is a mathematical approach designed for
+pedestrian dynamics, emphasizing the prevention of collisions among agents. The
+direction in which an agent moves is determined through an isotropic
+combination of exponential repulsion from nearby agents. The strength of this
+repulsion is influenced by the proximity to others within their surroundings,
+treating all directions equally in terms of influence. Agents adjust their
+speed according to the nearest neighbor in their headway, allowing them to
+navigate through congested areas without overlapping or obstructing each other.
+The collision-free speed model takes into account the length of the agent,
+which determines the required space for movement, and the maximum achievable
+speed of the agent. This simplified and computationally efficient model aims to
+mirror real-world pedestrian behaviors while maintaining smooth movement
+dynamics.
+
+The collision-free speed model is available in two variants in JuPedSim. Both
+variants implement the same algorithm but differ when it comes to defining model
+parameters globally vs. per-agent.
+
+In :class:`~jupedsim.models.CollisionFreeSpeedModel` neighbor and geometry
+repulsion parameters are global parameters, i.e. all agents use the same values
+and the values are constant over the simulation.
+
+In :class:`~jupedsim.models.CollisionFreeSpeedModelV2` neighbor and geometry
+repulsion parameters are per-agent parameters that can be set individually via
+:class:`~jupedsim.models.CollisionFreeSpeedModelV2AgentParameters` and can be
+changed at any time.
+
+A `detailed description
+<https://pedestriandynamics.org/models/collision_free_speed_model/>`_ is
+available on `PedestrianDynamics`_.
+
+The original publication can be found at https://arxiv.org/abs/1512.05597
+
+***********************************
+Generalized Centrifugal Force Model
+***********************************
+
+The Generalized Centrifugal Force Model is a force-based model that defines
+the movement of pedestrians through the combination of small-range forces. This
+model represents the spatial requirement of pedestrians, including their body
+asymmetry, in an elliptical shape with two axes dependent on speed. The
+semi-axis representing the dynamic space requirement in the direction of motion
+increases proportionally as speed increases. Conversely, the semi-axis along
+the shoulder direction decreases with higher velocities.
+
+A `detailed description
+<https://pedestriandynamics.org/models/generalized_centrifugal_force_model/>`_
+is available on `PedestrianDynamics`_.
+
+.. note::
+   The implementation does not allow to modify all parameters described. 
+   Espcially the following parameters are defined constant as:
+
+   * :math:`r'_c = r_c - r_{eps}`
+   * :math:`s_0 = \tilde{l} - r_{eps}`
+
+The original publication can be found at https://arxiv.org/abs/1008.4297
+
+******************
+Social Force Model
+******************
+
+The Social Force Model [1] is a force-based model that defines the movement of
+pedestrians by the combination of different social forces affecting an
+individual. The model defines forces that affect an individual:
+
+* A driving force
+* A repulsive force
+* An obstacle force
+
+The driving force represents a person’s desire to move in a certain direction,
+independent of other people and obstacles. The repulsive force is caused by the
+interaction between the individuals and causes them to avoid each other in
+order to avoid collisions. The obstacle force acts in a similar way to the
+person force to avoid collisions with obstacles in the environment.
+
+A `detailed description
+<https://pedestriandynamics.org/models/social_force_model/>`_ is available on
+`PedestrianDynamics`_.
+
+.. _PedestrianDynamics: https://PedestrianDynamics.org/

libsimulator/src/RoutingEngine.cpp

@@ -261,7 +261,7 @@ CDT::Face_handle RoutingEngine::find_face(K::Point_2 p) const
     const auto face = cdt.locate(p);
     if(face == nullptr || cdt.is_infinite(face) || !face->get_in_domain()) {
         throw SimulationError(
-            "Point ({}, {}) is outside oif accessible area",
+            "Point ({}, {}) is outside of accessible area",
             CGAL::to_double(p.x()),
             CGAL::to_double(p.y()));
     }

python_modules/jupedsim/jupedsim/models/generalized_centrifugal_force.py

@@ -29,7 +29,7 @@ class GeneralizedCentrifugalForceModel:
     max_geometry_interaction_distance: float = 2
     max_neighbor_interpolation_distance: float = 0.1
     max_geometry_interpolation_distance: float = 0.1
-    max_neighbor_repulsion_force: float = 3
+    max_neighbor_repulsion_force: float = 9
     max_geometry_repulsion_force: float = 3