update readme and install script fix

Author: calebguy

synd-cli/README.md

@@ -108,7 +108,7 @@ Run `synd-cli` to see all available commands. Main command categories:
 - `appchain handoff` - Transfer contract ownership
 - `appchain arb-owner` - Manage Arbitrum owner operations
 - `appchain check-token-bridge` - Verify token bridge setup
-- `appchain e2e` - Run end-to-end tests
+- `appchain e2e` - Run end-to-end tests for an appchain
 - `alias` - Calculate L1->L2 aliased addresses
 
 Each command supports:

synd-cli/install.sh

@@ -25,7 +25,7 @@ warn() {
 }
 
 error() {
-    printf "${RED}error${NC}: %s\n" "$1"
+    printf "${RED}error${NC}: %s\n" "$1" >&2
     exit 1
 }
 
@@ -52,11 +52,12 @@ detect_platform() {
 get_latest_version() {
     local latest
     # Find the latest synd-cli release (tags starting with "synd-cli-")
+    # The "|| true" prevents pipefail from exiting the script when no version is found
     latest=$(curl -fsSL "https://api.github.com/repos/${REPO}/releases" | \
         grep '"tag_name"' | \
         sed -E 's/.*"([^"]+)".*/\1/' | \
         grep '^synd-cli-' | \
-        head -n 1)
+        head -n 1 || true)
 
     if [[ -z "$latest" ]]; then
         error "Failed to fetch latest synd-cli version. Please check your internet connection or specify a version with SYND_VERSION=synd-cli-vX.Y.Z"