docs: Add demo for converting SFR2 to MODFLOW 6

Author: aleaf

examples/Notebooks/SFRmaker_demo.ipynb

@@ -0,0 +1,63 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Converting a MODFLOW-2005 style SFR Package to MODFLOW 6\n",
+    "\n",
+    "Sometimes you may want to convert a MODFLOW-2005 or MODFLOW-NWT model to MODFLOW 6, but the USGS `mf5to6` converter fails on the SFR Package. This notebook demonstrates how to convert a MODFLOW-2005 (or MODFLOW-NWT) SFR Package input file to MODFLOW 6 using SFRmaker."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import flopy\n",
+    "import sfrmaker\n",
+    "\n",
+    "# Load the model using Flopy\n",
+    "model = flopy.modflow.Modflow.load('tf_with_sfr.nam', model_ws='../tylerforks/tylerforks')\n",
+    "\n",
+    "#Check that the SFR package was loaded\n",
+    "model.get_package_list()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# Instantiate an `Mf6SFR` object (with the Flopy MODFLOW-2005 style SFR instance)\n",
+    "mf5to6 = sfrmaker.Mf6SFR(model.sfr)\n",
+    "\n",
+    "# Write the MODFLOW 6 SFR Package file\n",
+    "mf5to6.write_file('tf_mf6.sfr')"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "sfrmaker_ci",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.13.2"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}