Add NvimServer as submodule and add a script for local dev

.gitmodules

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+[submodule "NvimServer"]
+	path = NvimServer
+	url = git@github.com:qvacua/neovim.git

NvimServer

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+Subproject commit b800642b696d32c72e35d9459ea29fddf2534957

bin/build_nvimserver_for_local_dev.sh

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+#!/bin/bash
+# Executing this script will replace the download step of pre-built NvimServer.
+set -Eeuo pipefail
+
+readonly clean=${clean:-true}
+readonly build_dir_name="build"
+readonly build_dir_path="./${build_dir_name}"
+readonly nvimview_dir_path="./NvimView/Sources/NvimView/"
+
+build_for_local_dev() {
+  local -r nvimserver_path="./NvimServer"
+  pushd ${nvimserver_path} >/dev/null
+
+  if ${clean} ; then
+    xcodebuild -derivedDataPath ${build_dir_path} -configuration Release -scheme NvimServer clean
+  fi
+
+  build_deps=${clean} ./NvimServer/bin/build_libnvim.sh
+  xcodebuild -derivedDataPath ${build_dir_path} -configuration Release -scheme NvimServer build
+
+  popd >/dev/null
+
+  cp -r "./NvimServer/runtime" ${nvimview_dir_path}
+  cp "./NvimServer/${build_dir_path}/Build/Products/Release/NvimServer" ${nvimview_dir_path}
+  cp "${nvimview_dir_path}/com.qvacua.NvimView.vim" "${nvimview_dir_path}/runtime/plugin"
+}
+
+
+main() {
+  echo "### Building for local dev"
+  # This script is located in /NvimServer/bin and we have to go to /
+  pushd "$(dirname "${BASH_SOURCE[0]}")/.." >/dev/null
+
+  build_for_local_dev
+
+  echo "### Built for local dev"
+  popd >/dev/null
+}
+
+main