docs: About ABMs section

Created new about ABMs section using ChatGPT

docs/abm.rst

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+About Agent-Based Models
+========================
+
+Agent-based models (ABM) are a type of computational model used
+to simulate the behavior of autonomous agents within a system. These
+agents can be individuals, groups, organizations, or other entities
+that interact with one another and with their environment.
+
+One of the key features of ABMs is that they focus on the micro-level
+interactions between individual agents, rather than aggregating
+data to study macro-level phenomena. This allows for the examination
+of complex behaviors that emerge from the interactions between
+agents, such as the spread of a disease or the formation of social
+networks.
+
+ABMs are often used in fields such as economics, sociology, and
+biology to study the behavior of individuals and groups. They can
+also be used to simulate the effects of different policies or
+interventions on a system.
+
+In order to create an ABM, the researcher must first define the
+agents and their characteristics, such as their behavior, beliefs,
+and goals. They must also define the rules of interaction between
+the agents and their environment. Once these parameters are set,
+the model can be run to simulate the behavior of the agents over
+time.
+
+ABMs are a powerful tool for understanding complex systems, but
+they also have their limitations. Because they focus on micro-level
+interactions, they may not accurately capture macro-level phenomena.
+Additionally, they often require a significant amount of computational
+resources and can be difficult to validate.
+
+Overall, agent-based models are a valuable tool for understanding
+the behavior of complex systems and the emergence of complex behaviors
+from the interactions between individuals. However, it is important
+to use them in conjunction with other methods to fully understand
+the system being studied.
+
+..  toctree::

docs/index.rst

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     :maxdepth: 2
 
     installation
+    abm
     tutorial
     api/library_root
     changelog