Update bashrc and setup.sh

- Remove OpenClaw completion
- Add hostname to prompt
- Add Rust installation to setup.sh

setup.sh

@@ -23,6 +23,12 @@ echo ">>> Installing bash, kitty, and vim..."
 sudo apt update
 sudo apt install -y bash kitty vim-gtk3 git curl
 
+# Install Rust
+echo ">>> Installing Rust..."
+if ! command -v rustc &> /dev/null; then
+    curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
+fi
+
 # 2. Clone your dotfiles (bare repo style)
 if [ ! -d "$HOME/.dotfiles" ]; then
     echo ">>> Cloning dotfiles repo..."