feat: Install Neovim from nightlies

scripts/upstall_neovim_macos.zsh

@@ -0,0 +1,33 @@
+#!/bin/zsh
+
+# Determine OS and CPU architecture
+OS=$(uname -s | tr '[:upper:]' '[:lower:]')
+ARCH=$(uname -m)
+
+if [[ "$OS" == "darwin" ]]; then
+    # macOS installation
+    nightly_url="https://github.com/neovim/neovim/releases/download/nightly/nvim-macos-${ARCH}.tar.gz"
+    install_dir="~/opt"
+    
+    mkdir -p "${install_dir/#\~/$HOME}"
+    
+    echo "Downloading Neovim nightly for macOS ${ARCH}..."
+    curl -L "$nightly_url" | tar -xz -C "${install_dir/#\~/$HOME}"
+    echo "Neovim nightly installed to ${install_dir}/nvim-macos-${ARCH}"
+    
+elif [[ "$OS" == "linux" ]]; then
+    # Linux installation
+    nightly_url="https://github.com/neovim/neovim/releases/download/nightly/nvim.appimage"
+    install_dir="~/.local/bin"
+    
+    mkdir -p "${install_dir/#\~/$HOME}"
+    
+    echo "Downloading Neovim nightly AppImage..."
+    curl -L "$nightly_url" -o "${install_dir/#\~/$HOME}/nvim"
+    chmod +x "${install_dir/#\~/$HOME}/nvim"
+    echo "Neovim nightly installed to ${install_dir}/nvim"
+    
+else
+    echo "Unsupported OS: $OS"
+    exit 1
+fi