feat: enable exa search in opencode and add opencode installation

Author: lljbash

install_node.sh

@@ -10,3 +10,5 @@ curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.40.1/install.sh | bash
 source ~/.nvm/nvm.sh
 nvm install --lts
 nvm alias default lts/*
+
+npm install -g opencode-ai@latest

zshenv

@@ -53,6 +53,8 @@ unset -f get_var set_var dedup_var add_to_var
 # Other configurations
 ## git editor
 export EDITOR=nvim
+## opencode exa search
+export OPENCODE_ENABLE_EXA=1
 ## proxy server
 #export ALL_PROXY=socks5://localhost:1080
 ## using ccache for cmake