Add makemcdevsrc.sh

This script will build a folder in work/ that includes only
non imported NMS files. This folder can then be added to IDE as a
source to see unimported files without any duplicate class errors

makemcdevsrc.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+
+PS1="$"
+
+workdir=work
+minecraftversion=$(cat BuildData/info.json | grep minecraftVersion | cut -d '"' -f 4)
+decompiledir=$workdir/$minecraftversion
+nms=$decompiledir/net/minecraft/server
+cb=src/main/java/net/minecraft/server
+papernms=Paper-Server/src/main/java/net/minecraft/server
+mcdevsrc=${decompiledir}/src/net/minecraft/server
+rm -rf "${mcdevsrc}"
+mkdir -p "${mcdevsrc}"
+cp ${nms}/*.java "${mcdevsrc}/"
+
+for file in "${nms}/"*
+do
+    file=${file##*/}
+    # test if in Paper folder - already imported
+    if [ -f "${papernms}/${file}" ]; then
+        # remove from mcdevsrc folder
+        rm -f "${mcdevsrc}/${file}"
+    fi
+done
+echo "Built $decompiledir/src to be included in your project for src access";