INitial commit of CAC code

docs/Commands/min_style.md

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+# min_style
+
+```sh
+min_style minimizer
+```
+
+## Inputs
+
+`minimizer` - Either `fire` or `cg`.
+
+## Examples
+
+```sh
+min_style fire
+min_style cg
+```
+
+## Description
+
+This code sets the minimizer for future `minimize` commands.
+Currently CAC has implemented both conjugate gradient minimization, `cg`, and the fast inertial relaxation engine [1], `fire`. 
+
+## References
+
+[1] Guénolé, Julien et al. "Assessment and optimization of the fast inertial relaxation engine (fire) for energy minimization in atomistic simulations and its implementation in lammps" Computational Materials Science (2020)