docs(readme): added toc

README.md

@@ -15,6 +15,53 @@
 
 ---
 
+# Table of Contents
+- [Introduction](#introduction)
+  - [Design Philosophy and Workflow](#design-philosophy-and-workflow)
+  - [Funding](#funding)
+- [Usage](#usage)
+  - [Python installation](#python-installation)
+    - [pypi](#pypi)
+    - [source](#source)
+    - [source for developers](#source-for-developers)
+  - [Automatic Build and Installation](#automatic-build-and-installation)
+    - [Script Build and Installation Instructions](#script-build-and-installation-instructions)
+    - [Currently, known good platforms](#currently-known-good-platforms)
+  - [Manual Build Instructions](#manual-build-instructions)
+    - [Prerequisites](#prerequisites)
+    - [Install Scripts](#install-scripts)
+    - [Dependency Installation on Common Platforms](#dependency-installation-on-common-platforms)
+    - [Building the C++ Library](#building-the-c-library)
+    - [Installing the Library](#installing-the-library)
+    - [Minimum compiler versions](#minimum-compiler-versions)
+- [Code Architecture and Logical Flow](#code-architecture-and-logical-flow)
+- [Engines](#engines)
+  - [GraphEngine](#graphengine)
+  - [GraphEngine Configuration Options](#graphengine-configuration-options)
+  - [Available Partition Functions](#available-partition-functions)
+  - [AutoDiff](#autodiff)
+- [Reaclib in GridFire](#reaclib-in-gridfire)
+- [Engine Views](#engine-views)
+  - [A Note about composability](#a-note-about-composability)
+- [Numerical Solver Strategies](#numerical-solver-strategies)
+  - [NetworkSolverStrategy<EngineT>](#networksolverstrategyenginet)
+  - [NetIn and NetOut](#netin-and-netout)
+  - [DirectNetworkSolver (Implicit Rosenbrock Method)](#directnetworksolver-implicit-rosenbrock-method)
+  - [Algorithmic Workflow in DirectNetworkSolver](#algorithmic-workflow-in-directnetworksolver)
+  - [Future Solver Implementations](#future-solver-implementations)
+- [Python Extensibility](#python-extensibility)
+- [Usage Examples](#usage-examples)
+  - [C++](#c)
+    - [GraphEngine Initialization](#graphengine-initialization)
+    - [Adaptive Network View](#adaptive-network-view)
+    - [Composition Initialization](#composition-initialization)
+    - [Common Workflow Example](#common-workflow-example)
+    - [Callback Example](#callback-example)
+  - [Python](#python)
+    - [Common Workflow Example](#common-workflow-example-1)
+    - [Python callbacks](#python-callbacks)
+- [Related Projects](#related-projects)
+
 # Introduction
 GridFire is a C++ library designed to perform general nuclear network
 evolution. It is part of the larger SERiF project within the 4D-STAR